-16 - (-43) i got
-16 + (43) = 27
-156 - 98 i got
-156 + 98 = -254
-192 - 47 i got
-192 + -47 = -239
0 - (-51) i got
o + 51 = 51
-63 -89 i got
-63 + -89 = 152
-12 - (-21) i got
-12 + 21 = 9
92 - (-16) i got
92 + 16 = 108
72 - 15 i got
72 + -15 = 57
-86 - (-19) i got
-86 + 19 = 67
17 - (-46) i got
17 + 46 = 63
-78 - (-53) i got
-78 + 53 = -25
-156 + 98 ≠ -254 = -58
The rest are right.