$\:\frac{\sin\left(-x\right)}{\csc\left(x\right)}+\frac{\cos\left(-x\right)}{\sec\left(x\right)}$

$\left(3z+6\right)\left(3z+6\right)$

$\sqrt[3]{\frac{y^2}{y\frac{4}{5}}}$

$\left|2-\left(-8\right)-5-10+\left(-3\right)\right|$

$\lim_{x\to-2}\left(\frac{x^2-+x-6}{x+3}\right)$

$\int x\cdot x^2e^{2x}dx$