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<p>You could, well, go on to graduate school and become a professor, eventually working at a job that pays $100-150k/year with nice benefits. Or, you could start working for a company like Goldman Sachs and make $300k+ a year. Such groups are supposedly pretty needy for mathematicians.</p>
<p>But really, be lucky you’re not a REAL math major. Textbooks are in the form Lemma -> Theorem -> Proof -> Corollary. There is usually no room for examples in pure math textbooks, either, so you just end up memorizing all of the theorems and the proofs. I had to memorize 30 pages of proofs for the final exam in one of my math courses last year.</p>