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^{3x}((3y-2)cos(3y)-2xsin(3y)) is holomorphic in

**C**.

Hence Find the complex Potential f(z) such that u(x,y)=Re(f(x+iy))."

Well i think it should be harmonic because we cannot show that Re(z) is holomorphic and hence find its Complex Potential, just want you to confirm that with me.