12⁢π⁢∫-∞∞ⅇ-14⁢x2⁢Hen⁡(x)⁢ⅇ12⁢ⅈ⁢x⁢y⁢ⅆ⁡x=ⅈn⁢ⅇ-14⁢y2⁢Hen⁡(y),