Mathematical problem solving can be done with four stages, namely understanding the problem, making a plan, executing a plan and looking back. The purpose of this paper is to describe the process of looking back at mathematical problem solving using the wolframalpha website. The results showed that re-examining can be done in various ways including asking teachers, asking friends who are mathematically higher or using technology. One technology that can be used as a tool to check back is the Wolframalpha application.
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