Expression 3: "y" equals left parenthesis, "x" plus "a" , right parenthesis squared plus "a" squared left brace, negative 3 less than "y" less than 3 , right bracey=x+a2+a2−3<y<3
3
Expression 4: "a" equals left bracket, 0.0 3 , 0.0 6 , 0.0 9...1 , right bracketa=0.03,0.06,0.09...1