View Compilation Error

0_0_31935059_31858.cpp: In function 'long long int Merge(long long int)':
0_0_31935059_31858.cpp:10:60: error: expected ';' before ')' token
  return (18*(n/2)%mod*(n/2)%mod*a%mod+7*Merge(n/2)%mod)%mod);
                                                            ^
0_0_31935059_31858.cpp:10:60: error: expected primary-expression before ')' token