$\int\frac{y+x}{y-x}dx$

$\left(k-2\right)\left(k+4\right)=0$

$34+\left(-17-\left(+6\right)\right)-\left(-15\right)$

$\left(\frac{1}{5}y+10y^3\right)^3$

$\left(-3xy^3\right)\cdot\left(xy\right)$

$8x^2-6x-5=0$

$\lim_{x\to1}\left[ln\left(x^8-1\right)-ln\left(x^5-1\right)\right]$