You can put this solution on YOUR website! (7x-6x+4^2-1) + (-3x+3y-5^2+3)
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7x-6x = x
4^2 = 16
16-1 = 15
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x + 15 + (-3x+3y-5^2+3)
5^2 = 25
-25 + 3 = -22
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x + 15 + -3x + 3y - 22
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