View Compilation Error

0_0_21879223_26028.cpp: In member function 'Matrix Matrix::operator*(const Matrix&)':
0_0_21879223_26028.cpp:34:36: error: expected ';' before ')' token
      tmp.a[i][j]+=a[i][k]*M.a[k][j]);
                                    ^
0_0_21879223_26028.cpp: In member function 'void Matrix::operator*=(const Matrix&)':
0_0_21879223_26028.cpp:46:36: error: expected ';' before ')' token
      tmp.a[i][j]+=a[i][k]*M.a[k][j]);
                                    ^