It’s got intern-level intelligence
The problem is, it's not "intelligence". It's an enormous statistical based autocorrect.
AI doesn't understand math, it just knows that the next character in a string starting "2+2=" is almost unanimously "4" in all the data it's statistically analyzed. If you try to have it solve an equation that isn't commonly repeated, it can't solve it. Even when you try to train it on textbooks, it doesn't 'learn' the math, it tries to analyze the word patterns in the text of the book and attempts to replicate it. That's why it 'hallucinates', and also why it doesn't matter how much data you feed it, it won't be 'intelligent'.
It seems intelligent because we associate intelligence with language, and LLMs mimic language in an amazing way. But it's not 'thinking' the way we associate with intelligence. It's running complex math about what word should come next in a sentence based on the other sentences of that sort it's seen before.