$23\:\cdot\:\left(\:14\:-\:5\right)\:+\:27$

$\frac{\left(5x+33\right)}{\left(x-6\right)\left(x+3\right)}$

$\int\frac{x^2-1}{x\left(x^2+x-3\right)}dx$

$f\left(x\right)=5sen\left(\frac{x}{3}-\frac{\pi\:}{2}\right)+2$

$\left(7a+6\right)\left(6-7a\right)$

$\left(4x^6\right)^{\frac{5}{2}}$

$\int_0^{\pi}\cos\left(x\right)^4dx$