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

$\left(-9\right)+\left(-10\right)-\left(-11\right)-\left(-1\right)$

$\lim_{x\to0}\left(\frac{e^x}{\sqrt[3]{x}}\right)$

$\lim_{x\to0}\left(\frac{2a+x^2}{2a-x^2}\right)^{\frac{1}{x^2}}$

$h+x\tau-zx\right)\left(z+x\right)$

$\frac{d}{dx}\frac{1-xe^x}{x+e^x}$

$9^2-6ab+9b^2$