Question 733782


{{{(2x^2+9y^2-8)-(7x^2+9y^2-3)}}}


{{{2x^2+9y^2-8-7x^2-9y^2+3}}}


{{{(2x^2-7x^2)+(9y^2-9y^2)+(3-8)}}}


{{{-5x^2+(cross(9y^2)-cross(9y^2))-5}}}


{{{-5x^2-5}}}


{{{-5(x^2+1)}}}