Answer:
Input: 6 C, 12 H, 18 O
Output: 6 C, 12 H, 18 O
Step-by-step explanation:
6 carbons from glucose, 12 hydrogens from glucose, and 6 oxygen from glucose plus 12 from the 6O2 (6 x 2 = 12) for a total of 18 oxygen.
The input and output must be the same because you can't make more than what you had.