$sec^2x\:+\:csc^2x$
$\left(1-t\right)^2+t\left(1-t\right)+t^2$
$\left(2x^3-4y^2\right)\left(2x^3+2y^2\right)$
$\left(3^{x+2}\right)\cdot\left(3^{x-1}\right)\cdot\left(3^2\right)$
$5x\:2\:-\:15y\:+\:8y\:-\:y\:+\:6x\:2\:-17x\:2$
$y-4<5$
$x\sin\left(x\right)dx+ydy=0$
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