Expression 7: left parenthesis, "a" plus "t" left parenthesis, "c" minus "a" , right parenthesis , "b" plus "t" left parenthesis, "d" minus "b" , right parenthesis , right parenthesisa+tc−a,b+td−b
domain t Minimum: 00
less than or equal to "t" less than or equal to≤t≤