$\sin x\cos x=-1$
$-765-651$
$0=2x^2-16x-18$
$\left(-63\right)+\left(-21\right)+\left(85\right)-\left(95\right)$
$x-\left(1-x\right)^2$
$-\frac{1}{4y+6}$
$1-27w^3$
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