$\left(1+\tan^2\left(b\right)\right)\left(\cos^2\left(b\right)\right)$
$-9x^2+6x+63$
$-\left(x-1\right)^4$
$-322\:-\:2$
$324x^2-216x+36$
$\left(-4\right).\left(-9\right).0$
$n+4-9-5n$
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