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

$\frac{\left(z^4-81z^8b^6\right)}{\left(z^2-9z^4b^3\right)}$

$\int x\cdot e^{x^2+2}dx$

$4x+3=-1$

$2\cdot\left(-3\right)^2-3\cdot4$

$\frac{1}{4}\left(\frac{3}{5}\left(2x+3\right)^{\frac{5}{3}}-\frac{9}{2}\left(2x+3\right)^{\frac{2}{3}}\right);\:x=1;\:y=0$