$\int150sec^2\theta\:d\theta\:$

$\frac{dy}{dx}=0.2x^2+y$

$x^3+\frac{1}{2}x^2+\frac{2}{3}x-\frac{2}{5}+\frac{1}{4}x^3+\frac{1}{2}x^2-x+2+x^3+x^2+x$

$\left(2x^2-2\cdot\:\left(\frac{12}{2}\right)x+\left(\frac{12}{2}\right)^2\right)$

$\left(-9x-5x\right)\left(-x+5\right)$

$2\left(x^2-5x+3\right)^2$

$-\int x^2\left(x+1\right)^3dx$