Exercise 2.4.3: (back)
Q. (+ 5 (/ 1 0)) /: division by zero A. Divide by Zero error. Q. (sin 10 20) sin: expects 1 argument, given 2: 10 20 A. sin only accepts 1 argument. Q. (somef 10) reference to undefined identifier: somef A. The definition somef has not been declared.