$ln\left(x+1\right)+\frac{2}{ln\left(x+1\right)}$

$\int_0^l\left(x^3\cdot\left(\frac{3}{l^2}-\frac{3\cdot x}{l^3}\right)^2\right)dx$

$\left(4ab-7c\right)\left(ab-6c\right)$

$4x\:-\:8\:-\:8$

$2ydx+e^{-3}dy=0$

$e^x\left(y+1\right)dx+2\left(e^x+4\right)dy$