Some AI can do math, but LLMs and Neural Networks aren’t designed to do complex math, as all of their operations are (typically) based around addition. If it has enough pathways it can learn multiplication through sheer brute force, but only within the input space (hence the articles comments about 3 or 4 digit numbers).

At the end of the day, LLMs are for processing text. Multimodal models are generally converting audio/images to text so you have a common means of evaluation. However, none of that is concerned about logic, which is fundamental for math.