Question 1085696
{{{ (2x+y)(1+4x+3y)-6x(x+y) =(2x+y+4x(2x+y)+3y(2x+y))-(6x^2+6xy)}}}
{{{(2x+y)(1+4x+3y)-6x(x+y) =(2x+y+(8x^2+4xy)+(6xy+3y^2))-(6x^2+6xy)}}}
{{{(2x+y)(1+4x+3y)-6x(x+y) =(8x^2+2x+10xy+y+3y^2)-(6x^2+6xy)}}}
{{{(2x+y)(1+4x+3y)-6x(x+y) =2x^2+2x+4xy+y+3y^2}}}