$\frac{\cot\left(x\right)\cdot\csc\left(x\right)}{\cos\left(x\right)}+2\sin\left(x\right)$

$33-9-35+22-32-9+7-11$

$\frac{9}{2}\sin\:\left(3x\right)$

$x^2+2x+18=0$

$+\left(500-900\right)-\left(4000-5000\right)+\left(250-350\right)$

$\frac{dy}{dx}=\frac{x^2\left(seny\right)^2}{1+x}$

$\frac{\left(3x+4\right)\cosh\left(x\right)}{\sqrt{x^2-4x^3}}$