$\left(a^3-b^3\:\right)\left(a^3+b^2\right)$

$\frac{csc^2\left(x\right)}{\cot\left(x\right)}=\csc\left(x\right)\sec\left(x\right)$

$\int_0^2e^{-2x}x\:dx$

$6p-11p-10$

$\frac{3+x}{2}+\frac{x-1}{3}-\frac{2x-3}{6}$

$\sqrt{81-\left(x+3\right)^2}$

$1-\left(\cos a\sin a\cot a\right)=\left(\sin a\right)^2$