4.Integers 1 3 5 and so on but, also negative 1 negative 3 negative 5 off in the leftward direction Adding all of those up is going to give us pi squared over 4 That's amazing, and it's the core of what i want to show.
整数 1 3 5 等等, 但是,还有负 1 负 3 负 5 向左方向偏移 将所有这些相加将得到 pi 的 4 平方 这太棒了,这就是我想要展示的核心。机翻