$\frac{d}{dx}\left(\frac{e^x}{9x^2+4}\right)$

$x+3=9$

$\left(x+4\right)^{2}+\left(x+3\right)+x^{2}-3x-9$

$\tan\left(x\right)\sin\left(x\right)\left(\cos\left(x\right)^2\csc\left(x\right)-\sin\left(x\right)\right)$

$-\frac{32}{4}$

$\int4x\log xdx$

$\int\frac{\left(5\:x^3+15x^2+37x+3\right)\:}{\left(x^2+3x+7\right)}dx$