(1) rational number set (-7.5,4, root number (9/49), 2/3, cube root number (-27), 0. 15 cycle, 0).

(2) Set of rational numbers (root number 15, cube root number 16, -pai).

(3) Positive real number set (cycle of root number 15,4, root number (9/49), 2/3, cube root number16,0.15).

(4) Negative real number set (-7.5, cube root -27,-derivative).