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In a certain college with 987 students there are 363 students who have taken a course...

In a certain college with 987 students there are 363 students who have taken a course in calculus (and possibly other math courses), 228 who have take a course in discrete mathematics (and possibly other math courses), and 119 who have taken a course in both calculus and discrete mathematics. How many students at this college have taken a course in either calculus or discrete mathematics or both?

Your final answer should be a single integer but you must explain the calculations you did to get it.

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