$-3^8\:-3^{-5}-3$

$\left(\frac{2x^{\frac{2}{3}}}{y^{\frac{1}{2}}}\right)^2\left(\frac{3x^{\frac{-3}{6}}}{y^{\frac{1}{3}}}\right)^{\frac{1}{3}}$

$\left(2^5\cdot2^7\right)\cdot\left|2^2\cdot\left(2^2\right)^3\right|$

$\sqrt{4ab}$

$-\left[-1+\left(4+1\right)\right]+\left(-3+5\right)$

$\lim_{x\to0}\left(\frac{a^x-2\cdot\:\:cos\left(x\right)+a^{-x}}{xsin\left(x\right)}\right)$

$132.68\cdot4$