What's the equation for the incomplete combustion of methane

The Balanced chemical equation of incomplete combustion of methane is : {eq}2CH_{4} (g) + 3O_{2} (g) / rightarrow ... Part (b) : P a r t (b) : The incomplete combustion might take place whenever there is a low supply or insufficient supply of oxygen during combustion.

Explanation:

Complete combustion reacts oxygen with a fuel to produce carbon dioxide and water. Eg: 2C8H18 + 25O2→ 18CO2 + 16H20.