$f^2x-2fg=\left(f-g\right)^2$

$\lim_{x\to0}\left(\frac{9^x-6^x}{8^x}\right)$

$3\:a\:b\:x-8\:a\:b\:x+4\:a\:b\:x$

$\left(w^{-12}\right)^{-12}$

$\lim_{x\to0}\left(\frac{\ln\left(x+1\right)\ln\left(3\right)}{x-2}\right)$

$\int\left(5y^3\left(\sqrt{2-5y^4}\right)\right)dy$

$\lim_{n\to\infty}\left(e^{-\frac{n^2+2}{3n^2+n}}\right)$