$x^2-1<0$
$225x^2-30x+1$
$sen^2x\:+\frac{1}{tan^2x}$
$\int\left(1-4x\right)^5dx$
$8\cdot2+8\cdot10$
$\left(6x^2-y^5\right)^2$
$\left(3-z^2\right)\left(z^3-2z+1\right)$
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