$\frac{tan\left(35\right)-tan\left(19\right)}{1+tan\left(35\right)tan\left(19\right)}$
$a^2+b^2+c^2=13$
$-2\left(x-2\right)+5\ge4\left(2x-7\right)-3$
$18-\left(-20\right)$
$v-4<1$
$\frac{dy}{dx}y=\sqrt{\left(\frac{x}{x-7}\right)}$
$q^2-12q+24$
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