Complex Numbers

If the set \(R=\{(a, b): a+5 b=42, a, b \in \mathbb{N}\}\) has \(m\) elements and \(\sum_\limits{n=1}^m\left(1-i^{n !}\right)=x+i y\), where \(i=\sqrt{-1}\), then the value of \(m+x+y\) is