The following problems were generated by my Crypto problem generator.
Solution: (12 + (5 - (3 * (6 / 6))))
Solution: ((11 - (13 - (12 / 4))) * 1)
Solution: ((15 - 5) + ((12 - 12) * 14))
Solution: (((7 + 5) - 1) * (9 - 8))
Solution: ((8 + 7) * ((12 - 10) - 1))
Solution: ((10 + 3) * ((5 - 3) - 1))
Solution: ((10 - (6 - (15 - 11))) + 0)
Solution: (((7 - 2) - (11 - 14)) / 3)
Solution: ((10 / (13 - (9 - 6))) * 1)
Solution: (11 * (((4 + 4) + 2) - 9))