$\frac{a^4b\cdot a^0b^{-5}}{a^{-1}b^0}$

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

$\lim_{x\to\infty}x^3\left(\frac{2}{x}-\sin\left(\frac{2}{x}\right)\right)$

$\lim_{x\to3}\left(\frac{x^3+2x+3}{2}\right)$

$9x^2-150x+625$

$\left(2x^3+7x^5\right)\left(2x^3\cdot7x^5\right)$

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