$8n^2-12xy+12n^2m-12xy+6nm^2-12xy+m^3$

$\left(\frac{2}{3}a^3-\frac{1}{2}a^2b\right)+\left(\frac{1}{2}a^3+\frac{3}{4}a^2b-5a^3b^2\right)$

$\frac{dy}{dx}=x^2-2\left(1\right)$

$x+4>8$

$\frac{dy}{dx}+4y-e^{-x}=0$

$\int\:\:24x^3cos\left(x^4\right)dx$

$\int\frac{2x^2+3x+2}{x^3+x}dx$