$2x^2-5x=-2$

$\frac{\sin\left(a+b\right)-\sin\left(a-b\right)}{\cos\left(a+b\right)+\cos\left(a-b\right)}$

$1-\left(1+0.00520833\right)^{-60}$

$\frac{dy}{dx}+y=e^x+1$

$\:\:2x^2\:y^2+3xy^2+xy=0$

$3x+1=7$

$\lim\:_{x\to\:0}\left(\frac{arctan\left(sin\right)\left(3x\right)}{arcsin\left(2tanx\right)}\right)$