$\sqrt[4]{2^7}.3^{14}.5^4$

$\left(2^{-4}x\:z\:^{-3}\right)^5$

$\lim_{x\to0}\frac{\ln\left(7x\right)}{\ln\left(6x\right)}$

$\left(\frac{2}{3}x^2+3xy^2\right)$

$\frac{d^2}{dy^2}\left(e^{-x}\cos\left(y\right)-e^{-y}\cos\left(x\right)\right)$

$s^2-26s+169$

$\lim_{x\to0}\left(\frac{x}{lnx}-\frac{1}{sin\left(x-1\right)}\right)$