July 2022 1 5 Report
Упражнение на повторение 7 класс
(2a-b)^2-(2a-b-(2a+b)
(1-a)^2(1+a^2)-(1-a^4)
(2a+b)^2-9(a+b)^2
(a-2b)^2-25(3a-b)^2
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