It depends how you define the symbol |. In Number Theory, for example, for any integers [math]a,b[/math], [math]a|b[/math] means [math]a[/math] divides [math]b[/math], and is defined
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To solve a mathematical problem, you need to first identify what the problem is and what information you have. Then, you need to decide what operations to perform and in what order.
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