$7.2^3\:-\:3.2^2\:-\:2\:+10$

$\frac{dx}{dt}=2+2u+t+tu$

$-\left\{3-8\left[4-3+\left(5+2-10\right)-\left(4-5\right)-3\right]+4-8\right\}+2$

$\frac{tan^2x}{2\sin^2\left(x\right)}=\frac{1}{1+\cos\left(2x\right)}$

$\frac{dy}{dx}+y+5=0$

$\left(\left(2x^4\right)^3\right)^2$

$\lim_{x\to4}\left(\frac{\left(x^2-16\right)}{x^2-5x+6}\right)$