2C + 3H^2O^3 (water H2O) (the exponents are on the bottom) = what?
They are not exponents
water is $$H_2O$$
This means that each water molecule is made up of 2 hydrogen atoms and one oxygen atom.
$$2C + 3H_2O_3$$
http://www.wolframalpha.com/input/?i=2C+%2B+3H_2O_3
