A(a-3)= 2a-6 (a²+b²)²-a²(a²+b²)
m(m+n)-(m+n)²
(5y+7z)(12x²+6x)+(7z-5y)
(5y-7z)(12x²-6x)+(5y-7z)​

sashaburov199 sashaburov199    3   10.02.2021 22:59    0