$-3x-9\sqrt{5}\le-7x-13\sqrt{5}$

$\int x\frac{-9}{8}dx$

$\int\frac{e^{2x}}{e^{4x}-6e^{2x}+14}dy$

$4x^2y^2z-8x^2y+3x^2y^2z-2x^2y$

$\frac{\sin^2\left(x\right)}{1+\cos\left(x\right)}-\tan^2\left(x\right)\cot^2\left(x\right)$

$\frac{5x+7}{8}+\frac{6x-3}{8}$

$\frac{y+5}{\frac{5}{4}-125}$