$\frac{d}{dx}9xlnx-5x$

$\int\frac{1}{x^2\sqrt{16-25x^2}}dx$

$1-\left(4^2\right)-1$

$-2\left(-1\right)^5-3\left(-1\right)^3+6\left(-1\right)+1$

$-110+25-\left(-12\right)+13-10$

$\left(-5\right)-\left(-5\right)-\left(+7\right)+\left(-6\right)$

$\lim_{x\to\infty}\frac{x^2+x}{x+1}$