中文说明：转载别人的，希望对大家有帮助，包括方程求根，优化，数据拟合，随机模拟和统计分布，图形，微积分，微分方程，等等
English Description：
Reprint of others, hope to help everyone, including solving equations, optimization, data fitting, stochastic simulation and statistical distribution, graphics, differential and integral calculus, differential equations, and so on