$\frac{2-3x+4}{2-x}$

$\frac{x}{22}+9=12$

$\int_0^b\left(x+1\right)^{\left(-\frac{1}{2}\right)}dx$

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

$\int\left(raiz\left(x^2-4\right)\right)dx$

$27^3y^6-125z^3$

$\frac{dy}{dx}=\frac{6x}{7y}$