inte^x((2tanx)/(1+tanx)+cot^2(x+pi/4))dx...

`inte^x((2tanx)/(1+tanx)+cot^2(x+pi/4))dx` is equal to (a)`e^xtan(pi/4-x)+c` (b)`e^xtan(x-pi/4)+c` (c)`e^xtan((3pi)/4-x)+c` (d) none of these

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