$8b-2b+z+4z$

$\frac{\left[2\left(-3\right)^2\right]^2}{4^2}\:+\left[0.25+\frac{2}{3}-1+3^2\right]$

$-2xy+4xz$

$\lim_{x\to\infty}\left(\frac{104x^5+8cos\left(15x\right)}{13x^5+4}\right)$

$-2h\:+\:12\:\le\:122$

$5\log\:_a\left(y\right)-2\log\:_a\left(x+4\right)=2\log\:_a\left(y\right)+\log\:_a\left(x\right)$

$\int\frac{-8x^2}{x^4-1}dx$