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【Related Videos】 『Let's Understand the Most Beautiful Equation in the World (for Science)』 ( • Let's Understand the Most Beautiful Equation in the World (for Science) ) 『Let's Quickly Understand the Most Beautiful Equation in the World』 ( • Let's Understand the Most Beautiful Equation in the World ) 【Erratum】 (4:34) In the complex number 'a+bi', the real part is a and the imaginary part is b. In the video, 'bi' is expressed as the imaginary part, which is an error.