View Compilation Error

0_0_24379192_11208.cpp:42:4: error: stray '\' in program
    b[i - 1] += m[i - 1] * x, m[i - 1] = m[i - 1] \ d * m[i];
    ^
0_0_24379192_11208.cpp: In function 'int main(int, char**)':
0_0_24379192_11208.cpp:42:52: error: expected ';' before 'd'
    b[i - 1] += m[i - 1] * x, m[i - 1] = m[i - 1] \ d * m[i];
                                                    ^