“严谨的数学格式”是指数学杂志的编辑所要求的格式。

"Good mathematical style" means the style demanded by editors of math journals.

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对于作业1-4，解答要用严谨的数学格式仔细清晰的写下来。

For problem sets 1-4, the solutions are to be written out carefully and legibly, in good mathematical style.

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一旦你习惯了数学的许多分支，和许多不同的符号的格式，你就走在了解许多数学知识的路上了。

Once you're comfortable with the many branches of math, and the many different forms of notation, you're well on your way to knowing a lot of useful math.

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