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28 - 21.57 = 6.43
28 minus 27 is 1.
3x squared minus 25x minus 28
64 minus 28 is 36.
-10 minus -28 is 18.
-3 minus -28 is 25
Negative 37 minus 28 is -65.
28
It is: 32 minus 4 = 28
1 minus 25/28 is 3/28
It is: 28-21 = 7
40 - 28 = 12
96 - 28 = 68