$9x^2-24+1$

$\lim_{x\to4}\left(x^3+4x^2-x\right)$

$\int_{1.8}^{9.5}xdx$

$\left(x+2\right)\left(x^2+3x+4\right)$

$\log_{15}\left(3\right)+\log_{15}\left(x^2\right)=\log_{15}\left(3x+6\right)$

$e^x\frac{dy}{dx}=e^{-2y}+e^{-2x-2y}$

$5\left(x-3\right)-2\left(x+1\right)=4$