$x_n+\frac{x}{x}$
$2\left(x-2\right)=4\left(2x-7\right)$
$6w-5w$
$32-3.2$
$\int\frac{\sqrt{1-\sqrt{t}}}{\sqrt{t}}dt$
$42\cdot71$
$\left(-5\right)\cdot\left(-9\right)+8\cdot\left(-4\right)$
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