Question

please
please
answer

Answer 1

7p^3+18p^2q^2-21q^2

+8p^3+13p^2q^2

_____________________

15p^3+31p^2q^2-21q^2

Answer 2

Answer:

$7 {p}^{3}+18{p}^{2}{q}^{2}-21 {q}^{2}+13{p}^{2}{q}^{2}+8 {p}^{3} \\ 7 {p}^{3} + 8 {p}^{3} + 18 {p}^{2} {q}^{2} + 13 {p}^{2} {q}^{2} - 21 {q}^{2} \\ 15 {p}^{3} + 31 {p}^{2} {q}^{2} - 21 {q}^{2} \: \: answer$

I hope it will help you