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Introduction: In the world of mathematics... There was a loud "bang" and smoke was everywhere. Countless fragments were shot out from the explosion, splashing everywhere like raindrops, and catching people off guard like random arrows. A huge beam of light shot out, and the originally dark clouded sky suddenly became extremely dazzling. In the strong light, Ma Qiping gritted his teeth and rushed towards the bomb, his back seemed to reappear... The beginning of all this has to start with that time travel...