$\lim_{x\to0.2}\left(\frac{1-\cos\left(x\right)}{x}\right)$

$225h^2-60h+30$

$2\cos\left(x\right)\sin\left(x\right)+\sin\left(x\right)$

$\frac{x^4+5x^3+3x^2}{x}$

$\frac{3\:\cdot\:cos^2\left(x\right)}{2-2\:\cdot\:sin\left(x\right)}$

$\int\frac{cos^2x}{sin^2x}sinxdx$

$\left(1-\tan\left(b\right)\right)^3=\frac{\cot\left(b\right)-1}{\cot\left(b\right)}\left(\sec\left(b\right)^2-2\tan\left(b\right)\right)$