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The integral I=int(sin(x^(2))+2x^(2)cos(...

The integral `I=int(sin(x^(2))+2x^(2)cos(x^(2)))dx` (where `=xh(x)+c`, C is the constant of integration). If the range of `H(x)` is `[a, b],` then the value of `a+2b` is equal to

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