$-3+6x-2x-7$
$\left(x-4\right)\left(2x+7\right)$
$\lim_{y\to\infty}\left(ln5x-ln\left(x+2\right)\right)$
$35\:+\:t\:-\:6t^2$
$\left(\frac{4}{3}a^2b^3+\frac{7}{2}a^4b\right)^2$
$\int-\frac{9}{2}dx$
$9a^2-25m^2$
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