$\frac{6x^2-x-3x^2}{3n^3+n-1}$
$16\sin^2x-12=0$
$\frac{dy}{dx}=xy-3x$
$\lim_{x\to\frac{\pi}{2}}\left(\frac{\cos\left(x\right)}{x^3-1}\right)$
$7^3\cdot16^{-9}$
$50.654654\cdot2566.656456545454$
$\frac{cos}{1-sen}-sec$
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