$0.1\cdot\left(18.4-21.6\right)$
$3^{x-2}=9^{x+4}$
$\lim_{t\to4}\left(\frac{t^2-3t-4}{2-\sqrt{8-t}}\right)$
$49^2-42+9$
$\int_2^{+\infty}\left(\frac{1}{1+x}\right)dx$
$\left(2x\:+\:2\right)^3$
$\left(y+\frac{41}{12}\right)^3$
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