diff --git a/apps/UnitTestsApp/include/UnitTestsApp/UnitTests.h b/apps/UnitTestsApp/include/UnitTestsApp/UnitTests.h
new file mode 100644
index 00000000..1bda687a
--- /dev/null
+++ b/apps/UnitTestsApp/include/UnitTestsApp/UnitTests.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "AutomatonToImage/AutomatonToImage.h"
+#include "InputGenerator/RegexGenerator.h"
+#include "Interpreter/Interpreter.h"
+#include "Objects/AlgExpression.h"
+#include "Objects/FiniteAutomaton.h"
+#include "Objects/Grammar.h"
+#include "Objects/Language.h"
+#include "Objects/Regex.h"
+#include "Objects/TransformationMonoid.h"
+#include "Tester/Tester.h"
+#include "gtest/gtest.h"
+#include <functional>
+
+class UnitTests
+{
+public:
+    UnitTests(){};
+    
+    static int  InitTests(int argc, char** argv) {
+        ::testing::InitGoogleTest(&argc, argv);
+        return RUN_ALL_TESTS();
+    };
+
+    using Lexeme = AlgExpression::Lexeme;
+    using LexemeType = AlgExpression::Lexeme::Type;
+    static std::vector<Lexeme> parse_string(std::string str) {return AlgExpression::parse_string(str);};
+};
diff --git a/apps/UnitTestsApp/src/UnitTests.cpp b/apps/UnitTestsApp/src/UnitTests.cpp
index a28bdef2..e0d99604 100644
--- a/apps/UnitTestsApp/src/UnitTests.cpp
+++ b/apps/UnitTestsApp/src/UnitTests.cpp
@@ -1,18 +1,6 @@
-#include "AutomatonToImage/AutomatonToImage.h"
-#include "InputGenerator/RegexGenerator.h"
-#include "Interpreter/Interpreter.h"
-#include "Objects/FiniteAutomaton.h"
-#include "Objects/Grammar.h"
-#include "Objects/Language.h"
-#include "Objects/Regex.h"
-#include "Objects/TransformationMonoid.h"
-#include "Tester/Tester.h"
-#include "gtest/gtest.h"
-#include <functional>
+#include "UnitTestsApp/UnitTests.h"
 
 TEST(ParseStringTest, Test_regex_lexer) {
-	using L = AlgExpression::Lexeme::Type;
-
 	struct Test {
 		string regex_str;
 		bool want_err;
@@ -30,6 +18,13 @@ TEST(ParseStringTest, Test_regex_lexer) {
 		{"&", true},
 		{"&1", false, 1},
 		{"[b[a]:1&1]:2&2", false, 11},
+		// тесты на отрицание
+		{"^a", false, 2},
+		{"a^|b", true},
+		{"d^*^b", true},
+		{"d|^|b", true},
+		{"a^", false, 4}, // a . ^ eps
+		{"a|(c^)", false, 8}, // a | ( c . ^ eps )
 	};
 
 	for (const auto& t : tests) {
@@ -37,13 +32,13 @@ TEST(ParseStringTest, Test_regex_lexer) {
 		message << "Case: " << t.regex_str << ", WantErr: " << t.want_err;
 		SCOPED_TRACE(message.str());
 
-		vector<AlgExpression::Lexeme> l = AlgExpression::parse_string(t.regex_str);
+		vector<UnitTests::Lexeme> l = UnitTests::parse_string(t.regex_str);
 		ASSERT_FALSE(l.empty());
 
 		if (t.want_err) {
-			ASSERT_EQ(L::error, l[0].type);
+			ASSERT_EQ(UnitTests::LexemeType::error, l[0].type);
 		} else {
-			ASSERT_NE(L::error, l[0].type);
+			ASSERT_NE(UnitTests::LexemeType::error, l[0].type);
 			ASSERT_EQ(t.lexemes_len, l.size());
 			// TODO: добавить проверку содержимого l
 		}
@@ -493,4 +488,4 @@ TEST(TestCaseName, Test_GlaisterShallit) {
 	check_classes_number("a(b|c)(a|b)(b|c)", 5);
 	check_classes_number("abc|bca", 6);
 	check_classes_number("abc|bbc", 4);
-}
\ No newline at end of file
+}
diff --git a/apps/UnitTestsApp/src/main.cpp b/apps/UnitTestsApp/src/main.cpp
index 087e824b..3418bd4e 100644
--- a/apps/UnitTestsApp/src/main.cpp
+++ b/apps/UnitTestsApp/src/main.cpp
@@ -1,4 +1,5 @@
 #include "UnitTestsApp/Example.h"
+#include "UnitTestsApp/UnitTests.h"
 #include "gtest/gtest.h"
 #include <iostream>
 #include <thread>
@@ -7,6 +8,5 @@ using namespace std;
 int main(int argc, char** argv) {
 	cout << "Unit Tests\n";
 	// Тестирование
-	::testing::InitGoogleTest(&argc, argv);
-	return RUN_ALL_TESTS();
+	return UnitTests::InitTests(argc, argv);
 }
diff --git a/libs/Objects/CMakeLists.txt b/libs/Objects/CMakeLists.txt
index 1d1ff0f5..d78f0881 100644
--- a/libs/Objects/CMakeLists.txt
+++ b/libs/Objects/CMakeLists.txt
@@ -1,15 +1,6 @@
 # Set the project name
 project(Objects)
 
-include(FetchContent)
-FetchContent_Declare(
-  googletest
-  URL https://github.com/google/googletest/archive/03597a01ee50ed33e9dfd640b249b4be3799d395.zip
-)
-
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-FetchContent_MakeAvailable(googletest)
-
 # Create a sources variable with a link to all cpp files to compile
 set(SOURCES
         src/TransformationMonoid.cpp
@@ -35,5 +26,4 @@ target_include_directories(${PROJECT_NAME}
 target_link_libraries(${PROJECT_NAME}
         Fraction
         AutomatonToImage
-        gtest
         )
\ No newline at end of file
diff --git a/libs/Objects/include/Objects/AlgExpression.h b/libs/Objects/include/Objects/AlgExpression.h
index 6ab887af..8158e846 100644
--- a/libs/Objects/include/Objects/AlgExpression.h
+++ b/libs/Objects/include/Objects/AlgExpression.h
@@ -2,12 +2,10 @@
 
 #include "BaseObject.h"
 #include "iLogTemplate.h"
-#include "gtest/gtest.h"
 #include <map>
 #include <unordered_map>
 
 class AlgExpression : public BaseObject {
-	FRIEND_TEST(ParseStringTest, Test_regex_lexer);
 
   protected:
 	struct Lexeme {
@@ -18,7 +16,7 @@ class AlgExpression : public BaseObject {
 			alt,	   // |
 			conc,	   // .
 			star,	   // *
-			minus,	   // ^
+			negative,	   // ^
 			symb,	   // alphabet symbol
 			eps,	   // Epsilon
 			squareBrL, // [
@@ -42,7 +40,7 @@ class AlgExpression : public BaseObject {
 		conc,
 		// Unary:
 		star,
-		minus,
+		negative,
 		// Terminal:
 		symb,
 		// [i]
@@ -91,7 +89,6 @@ class AlgExpression : public BaseObject {
 	AlgExpression* scan_symb(const vector<Lexeme>&, int, int);
 	AlgExpression* scan_eps(const vector<Lexeme>&, int, int);
 	AlgExpression* scan_par(const vector<Lexeme>&, int, int);
-	AlgExpression* scan_minus(const vector<Lexeme>&, int, int);
 	static void update_balance(const AlgExpression::Lexeme&, int&);
 
 	// список листьев дерева regex
@@ -135,4 +132,5 @@ class AlgExpression : public BaseObject {
 
 	friend class FiniteAutomaton;
 	friend class Tester;
+	friend class UnitTests;
 };
\ No newline at end of file
diff --git a/libs/Objects/include/Objects/Regex.h b/libs/Objects/include/Objects/Regex.h
index 10e6e609..7d34eff8 100644
--- a/libs/Objects/include/Objects/Regex.h
+++ b/libs/Objects/include/Objects/Regex.h
@@ -36,6 +36,11 @@ class Regex : public AlgExpression {
 	void normalize_this_regex(const vector<pair<Regex, Regex>>&); // переписывание regex по
 																  // пользовательским правилам
 
+	// Построение из вектора лексем дерева регулярного выражения
+	// 2 и 3 аргумент - это начальный и конечный индекс рассматриваемых лексем в векторе
+	Regex* expr(const vector<Lexeme>&, int, int) override;
+	Regex* scan_minus(const vector<Lexeme>&, int, int);
+
   public:
 	Regex() = default;
 	Regex(const string&);
diff --git a/libs/Objects/src/AlgExpression.cpp b/libs/Objects/src/AlgExpression.cpp
index 698a439f..54df5f7b 100644
--- a/libs/Objects/src/AlgExpression.cpp
+++ b/libs/Objects/src/AlgExpression.cpp
@@ -111,7 +111,7 @@ string AlgExpression::to_txt() const {
 			// ставим скобки при итерации, если символов > 1
 			str1 = "(" + str1 + ")";
 		break;
-	case Type::minus:
+	case Type::negative:
 		symb = '^';
 		return symb + str1;
 	default:
@@ -164,7 +164,7 @@ string AlgExpression::type_to_str() const {
 		return "*";
 	case Type::symb:
 		return "symb";
-	case Type::minus:
+	case Type::negative:
 		return "^";
 	default:
 		break;
@@ -241,7 +241,7 @@ vector<AlgExpression::Lexeme> AlgExpression::parse_string(string str) {
 		Lexeme lexeme;
 		switch (c) {
 		case '^':
-			lexeme.type = Lexeme::Type::minus;
+			lexeme.type = Lexeme::Type::negative;
 			break;
 		case '(':
 			lexeme.type = Lexeme::Type::parL;
@@ -284,11 +284,14 @@ vector<AlgExpression::Lexeme> AlgExpression::parse_string(string str) {
 			brackets_are_empty = false;
 			break;
 		case '|':
+			if (index != 0 && lexemes.back().type == Lexeme::Type::negative)
+				return {Lexeme::Type::error};
 			lexeme.type = Lexeme::Type::alt;
 			break;
 		case '*':
 			if (index == 0 || (index != 0 && (lexemes.back().type == Lexeme::Type::star ||
-											  lexemes.back().type == Lexeme::Type::alt)))
+											  lexemes.back().type == Lexeme::Type::alt ||
+											  lexemes.back().type == Lexeme::Type::negative)))
 				return {Lexeme::Type::error};
 			lexeme.type = Lexeme::Type::star;
 			break;
@@ -339,7 +342,7 @@ vector<AlgExpression::Lexeme> AlgExpression::parse_string(string str) {
 				// AlgExpression::Lexeme right
 				lexeme.type == Lexeme::Type::symb || lexeme.type == Lexeme::Type::parL ||
 				lexeme.type == Lexeme::Type::squareBrL || lexeme.type == Lexeme::Type::ref ||
-				lexeme.type == Lexeme::Type::minus)) {
+				lexeme.type == Lexeme::Type::negative)) {
 			// We place . between
 			lexemes.emplace_back(Lexeme::Type::conc);
 		}
@@ -348,7 +351,7 @@ vector<AlgExpression::Lexeme> AlgExpression::parse_string(string str) {
 			((lexeme.type == Lexeme::Type::alt &&
 			  (lexemes.back().type == Lexeme::Type::parL ||
 			   lexemes.back().type == Lexeme::Type::squareBrL)) ||
-			 (lexemes.back().type == Lexeme::Type::alt &&
+			 ((lexemes.back().type == Lexeme::Type::alt || lexemes.back().type == Lexeme::Type::negative) &&
 			  (lexeme.type == Lexeme::Type::parR || lexeme.type == Lexeme::Type::squareBrR ||
 			   lexeme.type == Lexeme::Type::alt)))) {
 			//  We place eps between
@@ -386,7 +389,7 @@ vector<AlgExpression::Lexeme> AlgExpression::parse_string(string str) {
 		lexemes.insert(lexemes.begin(), {Lexeme::Type::eps});
 	}
 
-	if (lexemes.back().type == Lexeme::Type::alt) {
+	if (lexemes.back().type == Lexeme::Type::alt || lexemes.back().type == Lexeme::Type::negative) {
 		lexemes.emplace_back(Lexeme::Type::eps);
 	}
 
@@ -431,9 +434,6 @@ AlgExpression* AlgExpression::expr(const vector<AlgExpression::Lexeme>& lexemes,
 	if (!p) {
 		p = scan_conc(lexemes, index_start, index_end);
 	}
-	if (!p) {
-		p = scan_minus(lexemes, index_start, index_end);
-	}
 	if (!p) {
 		p = scan_star(lexemes, index_start, index_end);
 	}
@@ -453,28 +453,6 @@ void AlgExpression::update_balance(const AlgExpression::Lexeme& l, int& balance)
 	}
 }
 
-AlgExpression* AlgExpression::scan_minus(const vector<AlgExpression::Lexeme>& lexemes,
-										 int index_start, int index_end) {
-	AlgExpression* p = nullptr;
-
-	if (lexemes[index_start].type != Lexeme::Type::minus) {
-		return nullptr;
-	}
-
-	AlgExpression* l = expr(lexemes, index_start + 1, index_end);
-	if (l == nullptr) {
-		delete l;
-		return nullptr;
-	}
-	p = make();
-	p->term_l = l;
-	p->value = lexemes[index_start];
-	p->type = minus;
-
-	p->alphabet = l->alphabet;
-	return p;
-}
-
 AlgExpression* AlgExpression::scan_conc(const vector<AlgExpression::Lexeme>& lexemes,
 										int index_start, int index_end) {
 	AlgExpression* p = nullptr;
diff --git a/libs/Objects/src/Regex.cpp b/libs/Objects/src/Regex.cpp
index b59ab520..dbc91a0f 100644
--- a/libs/Objects/src/Regex.cpp
+++ b/libs/Objects/src/Regex.cpp
@@ -72,6 +72,55 @@ template <typename T> vector<Regex*> Regex::cast(vector<T*> ptrs) {
 	return regexPointers;
 }
 
+Regex* Regex::expr(const vector<AlgExpression::Lexeme>& lexemes, int index_start,
+								   int index_end) {
+	AlgExpression* p;
+	p = scan_symb(lexemes, index_start, index_end);
+	if (!p) {
+		p = scan_eps(lexemes, index_start, index_end);
+	}
+
+	if (!p) {
+		p = scan_alt(lexemes, index_start, index_end);
+	}
+	if (!p) {
+		p = scan_conc(lexemes, index_start, index_end);
+	}
+	if (!p) {
+		p = scan_minus(lexemes, index_start, index_end);
+	}
+	if (!p) {
+		p = scan_star(lexemes, index_start, index_end);
+	}
+	if (!p) {
+		p = scan_par(lexemes, index_start, index_end);
+	}
+	
+	return cast(p);
+}
+
+Regex* Regex::scan_minus(const vector<AlgExpression::Lexeme>& lexemes,
+										 int index_start, int index_end) {
+	Regex* p = nullptr;
+
+	if (lexemes[index_start].type != Lexeme::Type::negative) {
+		return nullptr;
+	}
+
+	Regex* l = expr(lexemes, index_start + 1, index_end);
+	if (l == nullptr) {
+		delete l;
+		return nullptr;
+	}
+	p = make();
+	p->term_l = l;
+	p->value = lexemes[index_start];
+	p->type = negative;
+
+	p->alphabet = l->alphabet;
+	return p;
+}
+
 // возвращает пару <вектор сотсояний, max_index>
 pair<vector<State>, int> Regex::get_thompson(int max_index) const {
 	string str;			  // идентификатор состояния