$-\:9t^2+5t-4t$
$3x^5\left(2x^3y^3\right)$
$120=x+59$
$-x^2-5=30-2x^2$
$31-2^2-1^3\cdot3$
$\left(\cot^2\:x\:+1\right)\left(1-\cos^{2\:}x\right)=1$
$6x^2+5x-25$
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