The mathematical couplets related to the Spring Festival are as follows:
1. Part I: addition, subtraction, multiplication and division, and legal connection; Bottom line: the bisector of the midline vertical line, and the thread is twisted.
2. Part I: Time is limited, so it is selected as the quasi-life coordinate; Downlink: In pursuit of no minimum, we must solve the life equation well.
3. Uplink: addition, subtraction, multiplication and division, and the legal algebra is combined for a hundred years; Bottom line: point, line, and surface, with fixed geometry and growing old together.
4. Part I: Sine Theorem, Cosine Theorem, the philosophy of knowing everything; Downlink: integral equation, fractional equation, square on the road is the future.
5. Uplink: negative positive angle of keratinization, positive angle of small angle, small angle of special angle of small angle, and function value is obtained from special angle; Downlink: the numerical value knows the terminal edge, the terminal edge knows the quadrant, the quadrant knows the symbol, and the symbol judges the terminal edge of the angle.