Question 976864

{{{3a^2b+2a^2b^2+(-ab^2+a^2b^2)}}}

={{{3a^2b+2a^2b^2-ab^2+a^2b^2}}}

={{{(a^2b^2+2a^2b^2)+3a^2b-ab^2}}}

={{{3a^2b^2+3a^2b-ab^2}}}