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x 10 y 15 calculate log x y x 2 y 2

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x =10, y=15 calculate log(x+y) - (x^2 + y^2)

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Answer to a math question x =10, y=15 calculate log(x+y) - (x^2 + y^2)

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$=\log_{10}(10+15)-(10^{2}+15^{2})$

$=2\log_{10}(5)-325$

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