$x^{\frac{4}{5}}\:x^{\frac{-2}{5}}\:x^{\frac{3}{5}}$

$\lim_{x\to\infty}\left(\frac{x}{\sqrt{x^2+9}}\right)$

$f\left(x\right)=x^3-9x\:area\:-\:2,1$

$\left(\frac{2x+4}{5x+6}\right)$

$\frac{d}{dx}\left(ln\left(225\:sin^2\left(x\right)\right)\right)$

$36x^6-49y^4$

$\int\sin\left(x\right)^6\cos\left(x\right)^3dx$