$\sqrt{x}+x+12=2x$
$\frac{\left(\left(3a+5\right)x^2-2bx^2+6x+3\right)}{x+1}$
$-2-2+-2\left(-2\right)^3$
$x^2-4x+4-x^2-9-x^2+2x+1\:$
$2x\log_{10}\left(\sqrt{x}\right)$
$\cos\left(\pi+2\arctan\left(\frac{\sqrt{11}}{5}\right)\right)$
$\int\frac{3-4x}{x^2-3x+2}dx$
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