Question

[(100-38:2):9-2]:7-1

Answer 1

[(100-19):9-2]:7-1=[(81:9-2)]:7-1=7:7-1=1-1=0

Answer 2

$\big[(100-38:2):9-2\big]:7-1 = \\ \\ = \big[(100-19):9-2\big]:7-1 = \\ \\ = (81:8-2):7-1 = \\ \\ = (9-2):7-1 = \\ \\ = 7:7-1 = \\ \\ = 1-1 = \\ \\ =0$