$3\sin\left(n\right)-1.93=0$
$\frac{4x^2+22x-41}{x+7}$
$4\sin\:^2\left(x\right)+4\sin\:\left(x\right)+1$
$\frac{3}{s^2\left(s^2+3\right)}$
$\left(\sqrt{3x+\sqrt{5y}}\right)\left(\sqrt{3x+\sqrt{5y}}\right)$
$9w^2+6w^2+3$
$-9r^2+4s^2$
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