Ihave two questions 1.) -54 decreased by the difference between -37 and 15 2.) the difference between -59 and 12 decreased by 72 i need asap getting the answer

1. -54 - (-37 - 15) <== ur equation
    -54 - (-52) =
    -54 + 52 = -2

2. (-59 - 12) - 72 <== ur equation
     -71 - 72 =
    - 143

" the difference " means subtract" decreased " means subtract

7.666270253x10 raised to the 18th power