$\int x\cdot e^{-4x}dx$

$-\frac{\left(cos\left(x\right)\cdot sin^3\left(x\right)\right)}{4}-\frac{\left(3\:cos\left(x\right)\:sin\left(x\right)\right)}{8}$

$2\log_{10}\left(x\right)=\left(\log_{10}\left(x\right)\right)^2$

$2\tan^2x+\sec^2x=2$

$tan^2b+1=sec^2b$

$\left(x^2+5^2\right)$

$14cos\:\left(x\right)\:+\:30\:=\:0\:$