View Compilation Error

0_0_25982377_4472.cpp: In function 'int main(int, const char**)':
0_0_25982377_4472.cpp:35:144: error: expected primary-expression before ';' token
                 ans += 2 * r * acos((r * r + dis * dis - m * m) / (2 * r * dis)) - 2 * m * acos((m * m + dis * dis - r * r) / (2 * m * dis)) + ;
                                                                                                                                                ^