Expression 3: negative StartFraction, 2 "a" Over pi , EndFraction arc tangent left parenthesis, StartFraction, "a" Over "x" , EndFraction , right parenthesis left brace, "x" less than 0 , right brace−2aπarctanaxx<0
3
Expression 4: negative StartFraction, "a" left parenthesis, "x" cubed minus "a" squared "x" , right parenthesis Over "x" left parenthesis, "x" minus "a" , right parenthesis squared , EndFraction left brace, 0 less than "x" less than "a" , right brace−ax3−a2xxx−a20<x<a
4
Expression 5: "y" equals 1 left brace, "a" less than "x" , right bracey=1a<x
