Формулы (а+б)^3=а^3+3а^2б+3аб^2+б^3
(a+b)^2=a^2+2ab+b^2
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Формулы (а+б)^3=а^3+3а^2б+3аб^2+б^3
(a+b)^2=a^2+2ab+b^2