View Compilation Error

0_0_25292197_12981.cpp: In function 'int main()':
0_0_25292197_12981.cpp:61:78: error: expected ';' before ')' token
      sum = (sum + ((b[j] * C[num[j]][k]) % mod) * C[n - num[j]][i - k]) % mod) % mod;
                                                                              ^