The value of (5+4(7-8) -1 ) -1 is
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4(7-8) -1
4(-1) -1
(-4 - 1)
[5+(-5)]-1
[5-5]-1
0-1=-1
4(-1) -1
(-4 - 1)
[5+(-5)]-1
[5-5]-1
0-1=-1
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