Question 636352
={{{(4v^4-4v^3+4v^2+16v-10)+(v^5+8v^3+7v^2-4v+6)+(-7v^4+v^2-8v-7)}}}
={{{4v^4-4v^3+4v^2+16v-10+v^5+8v^3+7v^2-4v+6-7v^4+v^2-8v-7}}}

={{{v^5+4v^4-7v^4-4v^3+8v^3+4v^2+7v^2+v^2+16v-4v-8v-10-7+6}}}
={{{v^5-3v^4+4v^3+12v^2+16v-12v-17+6}}}
={{{v^5-3v^4+4v^3+12v^2+4v-11}}}