$\frac{\left(3x^2+1\right)\cdot\left(3x^2-1\right)}{\left(6x+1\right)\cdot\left(6x-1\right)}$
$-\left(5x-y\right)^2$
$6x+3<8x-6$
$\frac{32v^4w^3}{4v^5w^4}$
$tan\left(x\right)cos^2\left(x\right)=\frac{\left(sin\left(x\right)-sin^3\left(x\right)\right)}{cos\left(x\right)}$
$3\sec^2x-3\tan^2x$
$4x^2-12xy+9x^2$
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