$-2x^5\left(9x^2-24x+16\right)+8x^7$

$\int\ln\left(x^2\right)\cdot\left(\frac{1}{x^3}\right)dx$

$\lim_{x\to0}\left(\frac{tanx\left(cosx-1\right)^2}{x^3}\right)$

$ln7x$

$\int\left(2x^2+5\right)^2\left(4x\right)dx$

$-1-\left[5-\left(-2\right)\right]$

$\int_0^a\left(\frac{1}{\sqrt{x^2+y^2}}\right)dx$