$\frac{\cos\left(2x\right)+\sin\left(x\right)^2}{1+\sin\left(x\right)}=1-\sin\left(x\right)$

$f\left(x\right)=\sqrt{x}^{-1}+2e^x$

$\left(20\right)\left(\sqrt{3b}\sqrt[3]{a}\right)^3\left(-x^2\right)^3$

$1-3-7$

$\int\left(\frac{2x-1}{\left(x^2+2x+2\right)\left(x-3\right)}\right)dx$

$\frac{dy}{dx}+7xe^y=0$

$\lim_{x\to1.5}\left(\cos\left(x\right)+\sin\left(x\right)\right)\tan^x$