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[" 4.If "sin(x+y)+cos(x+y)=log(x+y)" the...

[" 4.If "sin(x+y)+cos(x+y)=log(x+y)" then "(x^(2)y)/(ax^(2))=],[[" 1) "0," 2) "(-y)/(x)," 3) "1," 4) "-1]]

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