$\frac{1+\sin e}{\cos e}+\frac{\cos e}{1+\sin e}\:=2\sec e$

$\left(x+4\right)^2+\left(x-3\right)^2=\left(x+5\right)^2$

$\:\sqrt{2x}+\sqrt{3y}$

$\cos\left(2\right)\left(1-2\:sin\:\theta\:\right)=0$

$\sin\left(x\right)^2\tan\left(x\right)$

$\lim_{x\to0}\left(\frac{x^2\log\left(2\right)-4\log\left(x\right)}{x^2-4}\right)$

$\left(w-7\right)\left(w-5\right)$