Question

18-{6-[-3-√25-4)-7-9)³]-1}

Answer 1

18-{6-[-3-√25-4)-7-9)³]-1}

18-{6-[-3-√25(-7-9)³]-1}

(-16)³= -244

18-{6-[-3-√25 -244]-1}

[-3-√25-244]

[-3-5-244]= -252

18-{6+252-1}

18-{257}

18-257

=239