What is the chemical equation for cooking rice?
Essentially when rice is cooked all you are doing is adding water to it and heating it. No true chemical reaction occurs.  A way you could think of this addition of water in an equation is:
$$\ce{(C6H12O6)2 -&gt;[\Delta][water] (C6H12O6)2.xH2O}$$
Not the most accurate representation as water was not added to a crystal system but I hope this helps you understand that no real reaction is occuring.