View Compilation Error

0_0_17945804_25840.cpp: In function 'int main()':
0_0_17945804_25840.cpp:102:64: error: expected ')' before 'y'
                            add = ((ans- preno[j]*Lu(a[j].x,a[j]y,a[i].x,a[i].y)%mod)%mod+mod)%mod;
                                                                ^
0_0_17945804_25840.cpp:102:79: error: cannot convert 'node' to 'LL {aka long long int}' for argument '2' to 'LL Lu(LL, LL, LL, LL)'
                            add = ((ans- preno[j]*Lu(a[j].x,a[j]y,a[i].x,a[i].y)%mod)%mod+mod)%mod;
                                                                               ^