1) 3p²-6p-14
2)3m³a+6m²a²-3ma³
Объяснение:
1) (4p²-p)+(5p-7)-(p²-7)=4 p²-p+5p-7-p²+7= 3p²-6p-14
2)-3ma(m²-2ma+a²)=-3m³a+6m²a²-3ma³
:)
