$series\:\frac{2^n\left(x-1\right)^n}{n}$

$4x+6y-3xy+4y-5x-2xy$

$\frac{d^2}{dx^2}\left(\:s^2+s-6\right)$

$2\cos\left(3x\right)=0$

$\left(1+x^{-2}y^2\right)dx-\left(2x^{-1}y\right)dy=0$

$\int_3^{\infty}\left(\frac{5}{x}\right)dx$

$\int x^3\cdot sin\left(3+x^4\right)dx$