$\frac{3x^4-x^2+x}{x^3-2x}$

$\:\left(3x^2-2x\right)+\left(5x^2-6x\right)$

$-\int_{\infty}^e\left(\frac{1}{x\ln\left(x\right)}\right)dx$

$10+2\cdot10\left(0.67\right)^{25}$

$\left(85\right)x\left(75\right)$

$f\left(x\right)=3^3-2x^2+-12$