View Compilation Error

0_0_26015036_26639.cpp: In function 'int main()':
0_0_26015036_26639.cpp:27:94: error: expected ',' or ';' before ')' token
         ll sum=((quick(2,a+c)%mod)*(b+d+1)%mod)%mod+(quick(2,a)%mod)*(quick(2,b)%mod-b-1)%mod)%mod;
                                                                                              ^