$-8=-16$
$sec^2x+6tanx+4=0$
$-16t^2+70t+4=-5$
$3^2+3\left(3\right)\left(1\right)-\left(-4^2\right)$
$a^4+2a^2-24$
$a^3\left(b-c\right)+b^3\left(c-a\right)+ab\left(a-b\right)$
$a^2+30a+2500$
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