$v-4<1$

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

$\frac{3x^3-2x^2-7x-2}{x-2}$

$\lim_{x\to0}\left(x^3ln\left(2x\right)\right)$

$\frac{\left(\sin\:\left(3x\right)\right)}{\sin\left(x\right)}=2\cos\left(2x\right)+1$

$5x\left(4x+y\right)$

$2xy'-y=x^2$