Help with writing this chemical equation? (reaction is neutralization of antacid with hydrochloric acid)

(this is gr. 10 level by the way)

Okay, the antacid is Rolaids, it contains Calcium Carbonate, Magnesium hydroxide and simethicone.

How would I write this? and would simethicone be part of the equation?

thank you : )

CaCO3 + 2HCl = CaCl2 + CO2 + H2O

Mg(OH)2 + 2HCl = MgCl2 + 2H2O

Simethicone is not an antacid, it is an anti-foaming agent. It does not neutralize HCl.