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

$\lim_{x\to1}\left(x^{\left(\frac{1}{\left(x-1\right)}\right)}\right)$

$\left(2^5\right)+\left(-3^2\right)$

$\lim_{x\to0}\left(\frac{x+8}{x}\right)^{\frac{x}{9}}$

$ln7x$

$\frac{1}{\frac{1}{\sqrt{80-2t}}}\int\frac{1}{\sqrt{80-2t}}.\left(\frac{4000}{40-t}\right)-9.8dt$

$6m^2-19m+3$