$3+2\sec^2\left(x\right)=5+\tan^2\left(x\right)$
$-3g-2g$
$-x^4+x^2-2x^2+1$
$-6x+7y-19+80x-26x+6y$
$2x^3+14x^2$
$9x^2+18x+17$
$-64-54$
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