$\left(x-3.2\right)\left(x-4\right)$
$\int\frac{x}{\sqrt{x^{2}+36}}dx$
$\left(4a^4-9b^4\right)^2$
$5\left(2\right)-2\left(3\right)$
$3\cos x-2\cos x=\frac{1}{2}$
$3x^{2\:}+\:5\:+\:\frac{25}{4}$
$\left(4x^3+5y^2\right)^2$
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