Помогите пожалуйста СРОЧНО

Упростите выражение:
А) (12a-1)²-1

Б) (2a+6b)²-24ab

В) 121-(11-9x)²

Г) a²b²-(ab-7)²

Д) b²+49-(b-7)²

E) a⁴-81-(a²+9)²
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