View Compilation Error

0_0_39437623_23655.cpp: In function 'int main()':
0_0_39437623_23655.cpp:29:62: error: expected ')' before ']' token
   29 |                 printf("%lld\n",(solve(b)-solve(a-1)+mod)%mod]);
      |                       ~                                      ^
      |                                                              )