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What are the mathematical equations?
According to the number of unknowns, it is divided into one-dimensional equation, two-dimensional equation and multivariate equation;

According to the power of the unknown, it can be divided into linear equation, quadratic equation and multivariate equation.

According to the number and power of the unknown, it can be divided into binary linear equation, binary quadratic equation, binary multivariate equation and multivariate multivariate equation. . . .