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The value of int(-(pi/4)^(1/3))^((pi/4)^...

The value of `int_(-(pi/4)^(1/3))^((pi/4)^(1/3))(x^2)/((1+sin^2x^3)(1+e^(x^7)))dxi s` (a)`1/3tan^(-1)sqrt(2)` (b) `1/(3sqrt(2))tan^(-1)sqrt(2)` (c)`int_0^(pi/4)(sec^2dx)/(sec^2x+tan^2x)` (d) `1/3int_0^(pi/4)(sec^2x dx)/(sec^2x+tan^2x)`

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