$81z^2-180z+100$
$\:-\:9\:+\:7x\:+\:x\:$
$y\:=\:4x^2\:-\:3x\:-\:2$
$-\frac{8\left(7+3\right)}{\left(-8\right)}$
$6.56+1.1+7.96$
$9x\:-\:7y\:+\:12y\:-\:5x$
$-3\log\left(8v\right)=-9$
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