Mathematical instructions are how we represent low-level programming commands, FYI.
Other than that, what are you trying to say (i.e. do you have a point that is relevent to the discussion, or are you just trying to nitpick)?
You are seriously confused between things and models of them. I guess you think regular computers process mathematical instructions? No, they go through a sequence of electrical states just like any other electrical device.
Math enters the picture only when we abstract the process. IOW there is nothing inherently mathematical about either computer processors or gene expression but they can be modelled mathematically.
Mathematical instructions are how we represent low-level programming commands, FYI.
Other than that, what are you trying to say (i.e. do you have a point that is relevent to the discussion, or are you just trying to nitpick)?