$\frac{x^3+5x+3}{x^2+3}$

$\frac{\left(4\right)^{10}\cdot\left(-4\right)^3\cdot\left(-4\right)^7}{\left(4\right)^{15}\cdot\left(-4\right)^7}$

$121a^2-22a+4$

$\lim_{x\to\infty}\left(\sqrt[5]{x^5-x^4}-x\right)$

$\left(xyz+5\right)^2$

$3x^3+30x^2-177x+210$

$\lim_{x\to1}\left(\frac{x^3+2x-11}{x+3}\right)$