Expression 4: "y" equals negative 5 plus 0 "x" left brace, negative 5 less than "x" less than 5 , right bracey=−5+0x−5<x<5
4
Expression 5: "y" equals cosine "x" plus left parenthesis, "a" "x" squared plus "b" , right parenthesis left brace, negative 13 less than "x" less than 13 , right bracey=cosx+ax2+b−13<x<13