$\left(\frac{1}{8}a-\frac{1}{2}b\right)^2$

$-0,3405+21,7$

$f\left(t\right)=-5t^2+4t+3t^{-1}-6$

$\left(4x^6\:-2y^5\right)^5$

$\lim_{x\to1}\frac{\sqrt{x+1}\left(4\right)-\sqrt{x+1}\left(4\right)}{x\left(x-1\right)}$

$\sqrt[3]{4+4}$

$4-3\left(5-2\left(x+3\right)-3\left(2-5x\right)\right)$