$28.54+6.98$

$\left(6^{-2}\right)^{-6}$

$5\left(6\right)-\frac{\left(6\right)}{\left(2\right)}$

$\lim_{x\to infinity}\left(\frac{5x}{\ln\left(10\right)x}\right)$

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

$\lim_{x\to-\infty}\sqrt{x^2+x-2}-\pi x$

$\frac{\frac{\left(-80\right)}{4}x\left(-5\right)}{2}$