$1-\sin^2$
$64x^2-144x+48$
$x^4+7x^3+5x^2-31x-30$
$-7s+-s^2+-7s_{5s}$
$-47.90-86$
$\left(18x+7\right)^2$
$-12\:.\:-6\::\:2$
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