View Compilation Error

0_0_35160007_12726.cpp: In function 'long long int calc(long long int, long long int)':
0_0_35160007_12726.cpp:37:21: error: expected ';' before 'c'
  return (m1*(c1^c2))c^c3^calc(m1/2,c1);
                     ^
0_0_35160007_12726.cpp:37:21: error: 'c' was not declared in this scope