当x=1，m=3时，求4x（m-2）-5（m-2）的值．

Andrew is the owner of a bakery. There have been a number of burglaries in the vicinity of the bakery and he decided to install a security alarm system. He entered into a contract with Betta Security CC for the installation of the alarm. Andrew was requested to read and fill in a form confirming the order. The form contained a clause that ‘Betta Security CC accepts no liability whatsoever for any injury or loss sustained as a consequence of the wrongful installation or operation of any equipment supplied or fitted by it’.The installation of the alarm was carried out incorrectly. During the night the wiring short-circuited, which caused a fire that destroyed the bakery. Betta Security CC admits negligence but refuses to compensate Andrew for the losses sustained, relying on the exclusion clause.Required:Advise Andrew on the validity and consequences of the exclusion clause. (10 marks)