m2 = None if not isinstance(dist, Normal) else m**2 + s * 2
m3 = None if not isinstance(dist, Normal) else m**2 + s * 2
m4 = None if not isinstance(dist, Normal) else m**2 + s * 2
m5 = obj.method(another_obj.method()).attribute ** 2
m6 = None if ... else m**2 + s**2
