Oh, he definitely thought himself a little genius, didn't he? Tom had to wonder who this boy was even if he was feeling a bit resentful of the fact that he thought it was permissible to speak down to him as if he was spouting off standard textbook equations.
Tom didn't allow his irritation to show in the slightest. He kept it hidden away from the time being, still observing the other cooly as he continued to write in a neat, meticulous hand.
"Which Ulrike covers in his appendices to Agrippa's original equation," Tom answered. Ulrike certainly wasn't common reading; he tended to delve into slightly darker uses of Arthimancy. He was curious to see if the boy would be so familiar with such reading and would be as cocky about it.