Question

с первого по четвертый

Answer 1

$1) 3a b^{2}-8 a^{2}b+9 a^{2}b-3a b^{2}= a^{2}b \\ 2)3-4 x y^{3} z^{2}+5x y^{2} z^{3}+5x y^{3} z^{2}-3=x y^{3} z^{2}+5x y^{2} z^{3} \\ 3)23mnp+12 m^{5}np-17-21mnp=2mnp+12 m^{5}np-17 \\ 4)14pq-11pq+14p q^{3}+6pq=12pq+14p q^{3}=2pq(6+7 q^{2})$