Упростите выражение 1.(a+b)^3-(a^3+b^3) 2.(a+b)^3+(a-b)^3-2a^3 3.(a-b)^3+(b^3-a^3)

Question

Упростите выражение
1.(a+b)^3-(a^3+b^3)
2.(a+b)^3+(a-b)^3-2a^3
3.(a-b)^3+(b^3-a^3)

Answer 1

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