$2^2a\:-b^3\:-\:c^3-d^5$

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

$4\cos\left(x\right)=-1+2\cos\left(x\right)$

$\frac{d}{dx}\left(\sqrt[4]{\frac{\left(x^4+4\right)\left(x^2+2x+3\right)}{2x+4}}\right)$

$\frac{dy}{dx}=1\:-y^2$

$y\log\left(2^y\right)$

$\int\sqrt{2t^3+4}3t^5dx$