Description: 多少恨，昨夜梦魂中。还似旧时游上苑，车如流水马如龙。花月正春风。
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Recently, there is a funny photo circulates in the WeChat.
As one can see, the integration is complicated, and it really got me. I have contacted two other friends for advice. However, we both lost the ability to compute this integration manually.
I tried with Sympy in IPython . Still, we got no answer.