$x^3\:+\:x^2-x\:-1$

$y=\frac{x^2+2x}{x^3}$

$\int\sin\left(x^2\right)\:dx$

$4\frac{dy}{dx}=5\cos3x$

$\log\left(x\right)+\log\left(x-1\right)=1+\log\left(2\right)$

$\lim_{x\to0}\left(\frac{\cos\left(x\right)+2x+1}{3x}\right)$

$\int_{\pi}^{\frac{7\pi}{6}}\left(-\frac{7cos\left(x\right)}{-5+3sin\left(x\right)}\right)dx$