$\left(2a^3+36\right)\cdot\left(2a^3-36\right)$
$\tan^2a-\sec^2a$
$\left(5a^2-2c^3\right)^2$
$\left(y^2+4x^3\right)\cdot dx+\left(2xy-y^2\right)\cdot dy=0$
$-1-2-1$
$8y\:+\:2x\:+\:7\:-\:2\:+\:3y$
$01x^2+182x+91$
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