$\frac{1}{1+\cos x}=\cot^2x+\csc x\cot x+1$

$\left(y^3+y\right)\frac{dy}{dx}$

$\left(+3\right)x\left(-7\right)x\left(+2\right)$

$\sqrt[3]{\left(x^2+2\right)^2}$

$\lim_{t\to\infty}\left(\frac{\left(ln\left(t\right)\right)}{2t}\right)$

$7x-2x+10-3x-6$

$\frac{1}{s}\cdot\frac{1}{s}$