Question 187251
{{{3x^2/4- x^3/3 +x^2-x^3/5 +20}}}
{{{- x^3/3 -x^3/5+ 3x^2/4 + x^2 +20}}}
{{{-5x^3/15 - 3x^3/15 + 3x^2/4 + 4x^2/4 +20}}}
{{{-8x^3/15 + 7x^2/4 +20}}}