The momentum operator is $\hat{p} = -i\hbar \frac{\partial}{\partial x}$. Its complex conjugate is $\hat{p}^* = i\hbar \frac{\partial}{\partial x}$. Its Hermitian adjoint is $\hat{p}^\dagger = -i\hbar \frac{\partial}{\partial x}$. Thus, the complex conjugate and
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