$4x^2+12x=18$

$f\left(x\right)=\frac{9}{x^2-5x-14}$

$\left(+8.160\right)\:-\:\left(+9.149\right)\:$

$\frac{4x^2-24x+15}{x-5}$

$a\left(-3\right)\cdot a\left(-4\right)\cdot a\left(5\right)$

$\int_{-\pi}^{\pi}xsin\left(ax\right)dx$

$\left(\frac{8x^3}{5y^4}\right)^{-2}$