$2cosx-3tanx=0$
$9\left(6t+3\right)+5t$
$6x^2-4xy-2y^2$
$x^2-11x-11$
$\int-6e^{9y}dy$
$\sqrt{1+\frac{y^2}{49-y^2}}$
$\int9x\cdot\left(\ln\left(x\right)\right)^2dx$
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