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![3^3-5\cdot[6-2\cdot(9-10)^2]\\\\=27-5\cdot[6-2\cdot(-1)^2]\\\\=27-5\cdot(6-2\cdot1)\\\\=27-5\cdot(6-2)\\\\=27-5\cdot4\\\\=27-20\\\\=\boxed{7}](/tpl/images/0290/9204/39542.png)
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3^3-5[6-2(9-10)^2] simplify the equation...
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