$-x^3-3x^2-17x-8$
$81x^2-100$
$x^2+20x=-75$
$-5\left(-6\right)-10$
$49x^2-490x+1261$
$121x^6-88x^4+16x^2$
$\cot\left(x\right)^2-2\csc\left(x\right)^2=-5$
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