What are the chemical formula cellular respiration?

The general equation for aerobic respiration is as follows:

Organic compounds + Oxygen → Carbon dioxide + Water + Energy

Usually the organic compound is glucose, but other nutrients can be involved as well. The specific equation for glucose (and is most commonly used) is:

C6H12O6+ 6 O2→ 6 CO2+ 6 H2O + Energy (34-36 ATP + heat)

Alcohol Fermentation

Glucose → Ethanol + Carbon Dioxide + Energy (2 ATP)

C6H12O6→ 2 C2H5OH + 2 CO2 + Energy (2 ATP)

Lactic Acid Fermentation

Glucose → Lactic Acid + Energy (2 ATP)

C6H12O6 → C3H6O3 + Energy (2 ATP)