diff --git a/src/types/index.ts b/src/types/index.ts
index 9b747c6..1099012 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -4,8 +4,6 @@ export * from './arrays/non-empty-array/non-empty-array';
 export * from './arrays/tuple-of/tuple-of';
 export * from './extensions/arrayable/arrayable';
 export * from './extensions/nullable/nullable';
-export * from './numbers/math-add/math-add';
-export * from './numbers/math-subtract/math-subtract';
 export * from './objects/cookie/cookie';
 export * from './objects/object-entries/object-entries';
 export * from './objects/object-from-entries/object-from-entries';
diff --git a/src/types/numbers/math-add/math-add.ts b/src/types/numbers/math-add/math-add.ts
deleted file mode 100644
index 60204d8..0000000
--- a/src/types/numbers/math-add/math-add.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import type { ArrayOf } from '../../arrays/array-of/array-of';
-
-/**
- * Sums two numbers.
- */
-export type MathAdd<A extends number, B extends number> =
-	[...ArrayOf<'exactly', A>, ...ArrayOf<'exactly', B>]['length'];
diff --git a/src/types/numbers/math-subtract/math-subtract.ts b/src/types/numbers/math-subtract/math-subtract.ts
deleted file mode 100644
index 5f2263f..0000000
--- a/src/types/numbers/math-subtract/math-subtract.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import type { ArrayOf } from '../../arrays/array-of/array-of';
-
-/**
- * Subtracts two numbers.
- */
-export type MathSubtract<A extends number, B extends number> =
-	ArrayOf<'exactly', A> extends [...(infer U), ...ArrayOf<'exactly', B>] ? U['length'] : never;
diff --git a/src/types/type-fest.ts b/src/types/type-fest.ts
index afa7559..3bf6678 100644
--- a/src/types/type-fest.ts
+++ b/src/types/type-fest.ts
@@ -9,6 +9,8 @@ export type { SetReadonly as PartialReadonly } from 'type-fest';
 export type { SetRequired as PartialRequired } from 'type-fest';
 export type { SetReturnType as PartialReturnType } from 'type-fest';
 export type { Simplify as Explicit } from 'type-fest';
+export type { Subtract as MathSubtract } from 'type-fest';
+export type { Sum as MathAdd } from 'type-fest';
 export type { TsConfigJson as TsConfig } from 'type-fest';
 
 export type {