$\left(2xy+3+5\right)$
$x^2+2x-4<2$
$\:x-26=\:42$
$\frac{\sqrt{a}}{\sqrt{a}-\sqrt{ab}}$
$\lim\:_{x\to\:\:a}\left(\frac{cos\left(x\right)\cdot\:\:in\left(x\right)-a}{in\left(e^x-e^a\right)}\right)$
$5x^4-x^3+12x^2-6x-10$
$\left(2x+3y\right)+\left(2x+4\right)\left(2x-4\right)+12$
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