Question 24333
first problem
distributive the negative sign to the second bracket....
{{{q^4-2q^2+10-3q^4+-5q^2+5}}}
Now add each according to the the degrees
{{{-2q^4-7q^2+15}}}}

Do the same to the second one, you'll get
{{{6k^3-3k^2-2k}}}