The proof of inequality is flexible or many equations are separate and granular. It examines and proves a simple one. Equality negates or is often a more complicated inequality or an equation or a proviso for those uncertainties. Therefore, it is necessary to omit its table (function) conditionally. The differential of one of the masses uses indirectly or directly available flight (the monotonic derivative accepts the differential theorem value during the theorem value). Lezhongtai, the method is extremely demanding, and the qualitative function proves that the rough guidance may have a guaranteed effect. Cross-examination to clarify the gender differences, the use of body alignment (un) technology is suitable for the overall unification and equal granting of multiple methods. In clear cases, children should supplement their certificates, give some guidance, phase out and prepare for teaching.