$-\frac{5x}{x^2-x-6}$

$\left(x-5\right)\left(a+2\right)$

$2-5\cos\left(x\right)=6$

$\frac{dy}{dx}=\ln\left(x\right)^y\ln\left(y\right)$

$\frac{\left(sin\left(x\right)+cot\left(x\right)cos\left(x\right)\right)}{cot\left(x\right)}$

$\left(2a^6ga^7\right)^2$

$64\cdot22$