$3\:x+2\:y-\:\:\:z=12$

$\left(12a-7b\right)^2$

$-\frac{45}{2}\left(10\right)^2+336,67\cdot10$

$\int x.\csc^3\left(2x^2-3\right)dx$

$\frac{x^3\cdot x^5}{x^{-3}}$

$\int\left(\frac{\left(5x-13\right)}{\left[\left(x-3\right)\left(x-2\right)\right]}\right)dx$

$\sqrt{a}^5$