$\left(4+2\right)^2-12$

$\int\frac{\frac{4}{15}x+\frac{61}{15}}{\left(x^2+1\right)}dx$

$\left(6x^2+3y^3\right)\left(6x^2-3y^3\right)$

$\left(4m^2n+7nm^2\right)\left(-3m^2n+2mn^2\right)$

$x^2-2x+2=3$

$\frac{dy}{dx}\left(\left(-xy^2+3\right)^4=-4x-5y\right)$

$\frac{6x+2}{5}+\frac{4x-9}{3}=5$