$9^8\cdot9^{-5}$
$25x^2+60xyz+36y^2\:z^2$
$\int x^2\left(x^3-2\right)^{12}dx$
$\int_2^4\frac{lnx^2}{x}dx$
$a+3b;\:a\:=\:9;\:b=2$
$\left(3x-13y\right)\left(3x-13y\right)$
$\frac{x^2-9}{x^2-2x-8}\cdot\frac{x-4}{x-3}$
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