$\left(9-4m^2\right)$
$t\left(\frac{dy}{dt}\right)+36y=\frac{1}{t}$
$2x^2-4x=\:1$
$\frac{\sin\left(x\right)^2\csc\left(x\right)^2}{\cos\left(x\right)^2}$
$\left(a+b\right)\left(a^2-b\right)$
$\sin\left(4x\right)\cdot\cos\left(x\right)-\sin\left(3x\right)\cdot\cos\left(2x\right)=\sin\left(x\right)\cdot\cos\left(2x\right)$
$\left(21x^2-4y\right)\left(6x^2+y\right)$
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