$\left(w+4\right)^2$
$\lim_{x\to0}\left(\frac{1+\left(\tan\:x\right)^2-\cos\left(2x\right)}{x\sin\left(x\right)}\right)$
$\frac{1}{3}x^2-\frac{1}{2}x^2-2x=0$
$x^2-14x-1$
$x ^ { 2 } - 8 x + 11 = 0$
$x^2-4x-5>0$
$\sqrt{306x^7y^9y^{10}}$
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