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\[f(x)=\frac{1}{\sigma \sqrt{2\pi}}e^{-\frac{1}{2}\left( \frac{x-\mu}{\sigma} \right)^{2}}\] \[\int_{-\infty}^{\infty} e^{-x^{2}} \, dx = \sqrt{\pi}\]

#include <iostream>

int main(int argc, char *argv[]) {
    std::cout << "Hello World!" << std::endl;
    return 0;
}

if __name__ == '__main__':
    print("Hello World!")

public class Main {
    public static void main(String[] args) {
        System.out.println("Hello World!");
    }
}

x <- seq(-3, 3, len=200)
plot(x, dnorm(x), type='l', lwd='2', col='#570C80',
     main='Gaussian Distribution', xlab='random variable', ylab='density')

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得复刻个这样儿的：😍美丽的网址😍