$x^2+y^2-4x+7y-4=0$
$\frac{7x^3-x^2-7x}{x^2+7}$
$w^2+16w=-47$
$2x+3y=1$
$\left(\frac{4}{7}x^4-\frac{6}{5}y^2\right)^2$
$\left(2x-3\right)\left(4x-2\right)$
$\int\left(22\cos\left(11x\right)^5\right)dx$
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