$\left(1-\sin^2\left(75\right)\right)\left(1+\tan^2\left(75\right)\right)=1$
$9z-4\:cuando\:z=3$
$2x+1\le5$
$x-10=4$
$9x^6\:-\:36^3\:+\:36$
$\int2x\cos5xdx$
$\sqrt[4]{x^{12}y^{24}}$
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