Simplify 2h^3g+3(hg^3)+7h^2g^2+5h^3g+2(hg^3)

$2 h^{3} g + 3 (h g^{3}) + 7 h^{2} g^{2} + 5 h^{3} g + 2 (h g^{3})$

Remove parentheses.

$2 h^{3} g + 3 h g^{3} + 7 h^{2} g^{2} + 5 h^{3} g + 2 h g^{3}$

Simplify by adding terms.

Add $2 h^{3} g$ and $5 h^{3} g$ .

$7 h^{3} g + 3 h g^{3} + 7 h^{2} g^{2} + 2 h g^{3}$

Add $3 h g^{3}$ and $2 h g^{3}$ .

$7 h^{3} g + 5 h g^{3} + 7 h^{2} g^{2}$