$-402+205$

$6\left(3x-1\right)-8x=140+2\left(x-1\right)$

$\frac{3b^6}{b^6}$

$\int\left(\cos\left(x\right)\csc^9\left(x\right)\right)dx$

$\frac{d^2}{dx^2}\left(e^{5x}\cdot\cos\left(8\right)\right)$

$\frac{5}{3x}+\frac{1}{2}$

$\left(\sqrt{x}+1\right)^2\le x$