$\sqrt{12\:.\:\sqrt{y}^3}\:.\:\sqrt{6y}$
$\csc x+\cos x\cot-x=\sin x$
$\left(-7+1\right)-\left(-4-2\cdot3+1\right)$
$\frac{270}{-15}$
$4x^2-4x-39=0$
$x^2+2x-48$
$\int\:7x^2\sin\left(9x\right)dx$
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