$\cot^2\left(b\right)-\cos^2\left(b\right)=\left(\cot^2\left(b\right)\right)\left(\cos^2\left(b\right)\right)$

$2x\frac{dy}{dx}+y=4x$

$3x^2+7x+6$

$\frac{8}{5}u=40$

$3\left(10\right)^4\:-\:3\left(10\right)^3\:-\left(10\right)^2\:+\:3\left(10\right)\:-\:1\:$

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

$\int\frac{1+3x+9x^2-2x^3}{x^2}dt$