$\frac{1}{8}\arcsin\left(\frac{x}{2\sqrt{2}}\right)$

$\left(6a\:+\:7x\:+\:z\right)^2$

$7a-8b-5a+2b$

$sin^2x-cos^2x+1$

$2\:\frac{5}{4}\:.\:3\:\frac{4}{6}$

$\left(\frac{-2}{3}\cdot\frac{1}{5}\cdot\frac{-3}{5}\right)\left(x\cdot x\right)\left(a^2\cdot a^4\right)$

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