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The language of physics is mathematics. In order to study physics seriously, one needs to learn mathematics that took generations of brilliant people centuries to work out. Algebra, for example, was cutting-edge mathematics when it was being developed in Baghdad in the 9th century. But today it's just the first step along the journey.
It may be helpful to bring up the difference between mathematical statistics and statistics. The former is a branch of mathematics inspired by the latter. The situation is analogous to mathematical physics. Mathematical physics is a branch of mathematics inspired by physics and useful to physics, but itâs not physics.