If you literally do not need to know about logarithms to be a wizard, and gods can't tell Golarion about math on the order of the conjunction rule of probability, that substantially increases the probability that, in fact, the trick to synthesize your own spells is something on the order of 'invert this matrix here'.
Regardless. He can work with this.
"If you can't solve the very abstract problem, make up a very specific problem and consider what the scoring rule would have to look like for that," Keltham suggests.