$-9+18x$
$\left(\frac{1}{3}a-\frac{2}{5}b\right)^4$
$\lim_{x\to\infty}\left(x-\sqrt{x^2+5x+2}\right)$
$\left(9x^2-3x-30\right)$
$\left(7ax\right)^2$
$3\ln\left(a\right)-\frac{1}{2}\left(\ln\left(b\right)+\ln\left(c^2\right)\right)$
$3\left(x+9\right)-6\le2\:\left(x-5\right)$
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