$\frac{\left(-x\cdot\:abs\left(y\right)\cdot\:\sqrt{abs\left(y\right)}\right)}{\left(y\cdot\:abs\left(x\right)\cdot\:\sqrt{abs\left(x\right)}\right)}$

$4u^2-5u-6$

$f\:'\left(x\right)=\frac{x^2+y^2}{ln\:x}$

$9x^2-36y^8$

$\int x^8\ln\left(8x\right)dx$

$\frac{\left(\left(\sqrt{\left(2+h\right)^2+8\left(2+h\right)}\right)-\left(\sqrt{\left(2\right)^2+8\left(2\right)}\right)\right)}{h}$

$60x-x^2=0$