$x^2-8+16$
$17-6\cdot2$
$\left(tan\:x-cot\:x\right)\:sen\:x\:=\:1$
$\frac{3x\:+5}{2x^2-3x-9}$
$\int x\left(\frac{x}{\sqrt{x}}+1\right)dx$
$a^2+7ab-10ab+b^2$
$\frac{dc}{dt}=211$
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