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

$+\:4\:-\:\left(+3\:+\:4\:+\:7\right)\:$

$-\left(\sqrt{y+2}\right)^2$

$\left(2w^2-8\right)^2$

$\int_0^{\frac{w}{a}}\left(\frac{1-\sin\left(x\right)^2}{\cos\left(x\right)^2}\right)dx$

$\int\frac{3}{x^{3}}dx$

$\frac{2\cot x+1}{\cot2x}$