Question

[-7+8:(1 elevado a 5 -a raiz quadrada de 25)]:9

Answer 1

$.[-7+8:(1^5- \sqrt{25} )]:9= \\ \\ ~[-7+8:(1-5)]:9= \\ \\ ~[-7+8(-4)]:9= \\ \\ ~[-7-2]:9= \\ \\ ~[-9]:9=~-1$