Break maths some more

Break maths some more

CombineTerms is somewhat horribly broken

But it works well enough to beat doubles at "0.3 + 0.3 + 0.3"
...
And nothing else I've tried. In fact it's worse or equal to doubles at everything else so far.
But I haven't done many operations because CombineTerms breaks everything. Maybe it will get better if that isn't broken horribly.