$2b\left(b-2\right)$

$\left(5x+3x\right)+\left(10x-2\right)=15x+3x^2-2$

$x^2+3x-18x$

$\frac{dy}{dx}\left(\left(\frac{xy^3}{sec\left(y\right)-3}\right)=1+y^4\right)$

$\int_{-2}^0\left(x^3-3x^2-10x+24\right)dx$

$3x+3y-3x^2=-8$

$\int_0^{\pi}\left(x\sin\left(2x\right)\right)dx$