А)3a(2a-b)+2a(b-3a)
6a²-3ab+2ab-6a²
-ab
б)(1+m²)(1-m²+m⁴)
1³+(m²)³
1+m^6
в)2(1-3a)²-2(3a-1)(3a+2)
2*1²-2*1*3a+(3a)²-2*9a²+6a-3a-2
2*1-6a+9a²-18a²+3a-2
2-6a+9a²-18a²+3a-2
-3a-9a²
-9a²-3a
г)(p+4)³-p³-12p³-14
p³+3*p²*4+3*p*4²+4³-p³-12p³-14
p³+12p²+48p+64-p³-12p³-14
-12p³+12p²+48p-14