$\left(\:x\:-\:1\right)\:\left(3\:x\:+\:5\right)\:\left(\:x\:+\:2\right)\:\left(5\:x\:-\:2\right)$

$3b-10c-\left(5a+7b-2c\right)+4a+c$

$\int_a^{-2}\left(\frac{2}{x^2-1}\right)dx$

$\frac{tan\left(x\right)-1}{tan\left(x\right)+1}=\frac{\sec^2\left(x\right)-2}{\sec^2\left(x\right)+2\tan\left(x\right)}$

$\frac{d^2y}{dx^2}=\frac{4x-1}{5x+3}$

$4xy^3-6x^2y^2+10y^4$

$3-8+\left|5-\left(3+2-6\right)+4\right|$