$\sin y=5x^4-5$
$-1+\left(-3\right)-\left(-7\right)$
$67\:+\:m\:2\:-\:9m\:2\:+\:5\:-\:11m\:2\:-\:23$
$7h-3h+2h^2-h+6h$
$15z-3z\left(12z-9\right)+8\left(2z^2+7z-14\right)$
$\sqrt{20}-\sqrt{180}-\left(-\sqrt{147}\right)$
$2z+3yz-6z+2yz+y-z-4y$
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