Question

$5y {}^{2} -( - 4y {}^{2} + 7y {}^{2})( - y {}^{2} + 9y - 11y {}^{2})$

Answer 1

$5y^{2} -( - 4y^{2} + 7y^{2})( - y^{2} + 9y - 11y^{2}) 5y^2 -3y^2(9y - 12y^2) 5y^2-27y^3+36y^4 S: 36y^4-27y^3+5y^2$