Ответ:

  1. \((7!-5!)/5!=7!/5!-1=42-1=41\).
  2. \((6!-4!)/5!=(720-24)/120=29/5\).
  3. \(149!/148!-36!/35!=149-36=113\).
  4. \(97!/96!+35!/34!=97+35=132\).
  5. \((4!\cdot8!)/(6!\cdot7!)=8/(6\cdot5)=4/15\).
  6. \((9!\cdot5!)/(7!\cdot6!)=(9\cdot8)/6=12\).