Помогите пожалуйста упростить выражения

А) (х-2)^2 + х(х+4)
Б) (2а+5)^2-5(4а+5)
В) 4b(b-1)-(2b+2)^2
Г)(b-6)^2+ (b-1)(2-b)
Д) (а+6)(5-а)-(а-1)^2
Е)(5+2у)(у-3)-(5-6у)^2
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