$9^3\cdot3^3$

$5x-3\le2x+15$

$\:x+\sqrt{2x^2+2x-3}=-1$

$\lim_{x\to\infty}\left(\frac{4x^3}{e^{5x}}\right)$

$\lim_{x\to-\infty}\ln\left|\frac{x}{x+2}\right|$

$25xy^2+80xy+64y^2$

$-3\left(2\right)^5\left(-3\right)^1+2\left(-5\right)^2\left(-3\right)^0+7\left(-5\right)\left(2\right)^2-1500\left(-5\right)^0\left(2\right)^0\left(-3\right)^0$