$-\frac{24}{3}$

$\frac{\frac{\cos\:x}{\sin\:x}}{-\csc\:^2x}$

$6x^3-24x$

$\sqrt[7]{\left(\left(\frac{x}{8}\right)^8\left(\frac{x}{y}\right)^{11}\left(\frac{e^x}{b^x}\right)^{-10}\right)}$

$\frac{3}{5}+\frac{4}{6}\right)\left(\frac{4}{7}=\frac{1}{5}\right)$

$8x^3-5x^2-\frac{x}{12}$

$\int\frac{1}{x^2\cdot\sqrt{16+9x^2}}dx$