$\frac{x^7}{\left(1\:+\:x\right)^3}$

$12-\left(9+6\right)$

$2x^2-14x+3=0$

$\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}}\left(\frac{7\sin\left(x\right)}{\cos^2\left(x\right)}\right)dx$

$4+2\cdot\left(6-\left(-5+4\right)-2\right)+1$

$\frac{d^2}{dx^2}\left(10x^2-3x+1\right)$

$\frac{x^{-3}\left(2x\right)-\left(x^2+1\right)\left(-3x^4\right)}{x^{-6}}$