$\left(5x^{\frac{1}{3}}\right)\left(4x^{\frac{1}{5}}\right)$

$\left(x+1\right)^2+y^2+kx=0$

$\left(8x^2y^5\right)^{-2}$

$8x-x-6$

$\lim_{x\to3}\left(\frac{x^2-8x+15}{\left(x-3\right)^2}\right)$

$\ln\left(\frac{x}{y}\right)=\ln\left(x\right)-\ln\left(y\right)$

$\frac{7-7cos^2x}{sin^2x}$