$\int16x^{-5}dx$

$\int\frac{x+4}{x^2+5x-7}dx$

$a-b+c-8a-c-10+b-7b-9+21a-d+50$

$\frac{1}{3}x+8x^4-\frac{2}{3}x^2-x$

$\int_0^2\left(\frac{1}{x\left(lnx\right)^2}\right)dx$

$0.2628740125-\left(\frac{-0.9999984242\left(1.3-\:0.2628740125\right)}{12.78584918+0.9999984242}\right)$

$x^2-3x\:\:-3$