In gas phase reactions, it is not uncommon to have a non-reacting molecule provide or take up kinetic energy as part of the reaction. For example,

$$\ce{O2(g) + O(g) + M(g) -> O3(g) + M(g)}$$

Source e.g. https://pubs.acs.org/doi/10.1021/j100663a002

M is an unspecified molecule. You could also write it above the arrow like other catalysts.

CO + OH(+O2) -> HO2 + CO2

That looks like a typo or bad image to text conversion.

In gas phase reactions, it is not uncommon to have a non-reacting molecule provide or take up kinetic energy as part of the reaction. For example,

$$\ce{O2(g) + O(g) + M(g) -> O3(g) + M(g)}$$

Source e.g. https://pubs.acs.org/doi/10.1021/j100663a002

M is an unspecified molecule. You could also write it above the arrow like other catalysts.