Answer:
[tex] \tt \red{sum \: up \: the \: law \: of \: above \: formula}[/tex]
The first Column is simple addition
The Largest expression does not exceed 50
The Second Column is also an addition
[tex] \tt \red{but \: the \: maxinum \: operation \: range } \\ \tt \red{ of \: the \: expression \: exceeds \: 50}[/tex]
The Third Column is exponential operation, and the number of operation is larger
