Observe the following pattern `(1xx2)+(2xx3)=(2xx3xx4)/3,` `(1xx2)+(2xx3)+(3xx4)=(3xx4xx5)/3,` `(1xx2)+(2xx3)+(3xx4)+(4xx5)=(4xx5xx6)/3` and find the value of `\ (1xx2)+(2xx3)+(3xx4)+(4xx5)+(5xx6)`