$x^2-12x+27=0$
$\int\frac{\left(7+3\:cos\:y\right)}{sin^2y}dy$
$6+2\left(5-4-\frac{2}{\left(-2\right)}-7\right)$
$\frac{3m^{10}n^{10}}{15m^6n^4}$
$\sqrt{2}cosx-1=0$
$2^5-2^2$
$18-x<21x-26$
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