$x^2+2bx+bx$

$\left(-3\right)^2-4\left(1\right)\left(-3\right)$

$\left(\frac{2}{3}a^{x+1}-\frac{3}{4}b^{x+2}\right)^2$

$\left(a-\frac{3}{5}b\right)^3$

$5x^3y^2-7x^2y^3$

$\int_2^{\infty}\left(\frac{2}{x\left(\sqrt{x^2-4}\right)}\right)dx$

$\frac{dy}{dx}=\frac{ln\left(x\right)}{xy+xy^3}$