$0=6x-\frac{48}{x^2}$
$2\cos\left(x\right)+\sin\left(y\right)=1$
$n ^ { 4 } - 2 n ^ { 3 } - 3 n ^ { 2 } + 4 n + 4$
$6x^2-x+1$
$-15m+18m$
$8n-4+2n$
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