$5x^2-45x+25=0$
$\frac{d^2}{dx^2}\left(3x\:+\:1\right)\:^7$
$10x-2$
$y=x\sqrt{e}x^2\left(x^2+5\right)^{10}$
$\left(7b^2+15b+2\right)$
$\lim_{x\to2.01}\left(\frac{x^2-5x+6}{x-2}\right)$
$\cos\left(2\theta\right)+2\sen\left(\theta\right)-1=0$
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