1:(> 3 2)
   2:(< 3 2)
   3:(= 3 2)
   4:(>= 4 2)
   5:(real? (/ 3 2))
   6:(real? (/ 3.0 2.0))
   7:(rational? (expt 2 3))
   8:(integer? (sqrt 4))
   9:(complex? (- 3))
  10:(number? (/ 3))