title: How to return the real/imaginary part of a symbolic polynomial in MATLAB?
body: <p>Given a polynomial such as <code>(a+b*i)*c+i</code>, where <code>a</code>, <code>b</code>, <code>c</code> are defined as symbolic elements to represent three real values and <code>i</code> is the imaginary unit, how to return the real part and imaginary part of this polynomial?</p>