$\frac{1}{1-\cos\left(3v\right)}+\frac{1}{1+\cos\left(3v\right)}$

$\frac{0.75}{100}$

$\cos\left(x\right)\cdot\left(-tan\left(x\right)+x\right)$

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

$-3x^2+5x-2=0$

$\lim_{x\to\infty}\left(\frac{x^4-x^2+1}{x^5+x^3-x}\right)$

$\left(5u+2v\right)\left(u-3v\right)$