$\int\frac{\sqrt{x^2-16}}{x^9}dx$

$7g+4h+6g+h$

$\int x^3log2xdx$

$2y+2y+2x$

$3\left(5^{\left(2x\:-6\right)}\right)\:=\:\frac{2^{x+7}}{7^x}$

$\int_{\ln\left(\frac{\pi}{6}\right)}^{\ln\left(\frac{\pi}{2}\right)}\left(2\cdot e^x\cdot\cos\left(e^x\right)\right)dx$

$\frac{\csc^20}{1+\tan^20}=\cot^20$