The constraint condition is 24* v= definite integral result +a*b*3*0.75, and then giving the correct value will give the value of lingo. Regarding fitting, you do scattered research and use fitting well. After fitting, you can use MATLAB to directly output the expression and directly integrate that expression. There should be many methods for this model. Since you need to learn mathematics to make a mathematical model, you can improve the model by thinking about it.
mathematical model
Generally, it is a mathematical simplification of practical things. It often exists in an abstract form close to the real thing in a sense, but it is essentially different from the real thing. There are many ways to describe an actual phenomenon, such as recording, video recording, metaphor, rumors and so on. In order to make the description more scientific, reasonable, objective and repeatable, people use a generally accepted strict language to describe various phenomena, which is mathematics.
Refer to the above content: Baidu Encyclopedia-Mathematical Modeling