$y^2-4y-36$
$x^2+12x-25$
$4\:x\:-\:6\:>\:6x$
$2x^2-32x^2$
$2\left(3.1\right)$
$\cos\:^{\left(2\right)}x=\sin\:^{\left(2\right)}x\cos\:^{\left(2\right)}x+\cos\:^{\left(2\right)}x$
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