(m+15)+n; (m+7)+n; (m+48)+(n+20); (m+26)+(n+14); m+(n+9) (m+30)+(n+17)

(m+15)+n=m+15+n (m+7)+n=m+7+n (m+48)+(n+20)=m+68+n (m+26)+(n+14)=m+40+n m+(n+9)=m+n+9 (m+30)+(n+17)=m+47+n