$\frac{dy}{dx}=-5xy^3$

$\frac{\frac{x^2+7x+10}{x^2-2x-8}}{\frac{x^2+6x+5}{x^2-3x-4}}$

$\frac{a}{b}-\frac{c}{d}+\frac{v}{f}$

$3x^2+27=-18x$

$\int\frac{x\cdot arcsen\left(x\right)}{\sqrt{1-x^2}}dx$

$( 2 a ^ { 3 } b ^ { 3 } ) ^ { - 4 } ( b ^ { - 1 } a ^ { 8 } ) ^ { 4 }$

$\:\:\:\:2x^2\:-\:2x\:+\:3x\:-\:5\:+\:7x^2$