[tex] - 7 \ times ( - 25) \ div 5[ / tex][tex]77 \ div ( - 11) \ times 4[ / tex][tex]3 \ times ( - 15 + 11)[ / tex][tex] - 3 + 4 + 7 - 8 \ times 4[ / tex][tex]4 - 8 - 9 - \ times 2 + 9[ / tex][tex](90?
[tex] - 7 \ times ( - 25) \ div 5[ / tex] [tex]77 \ div ( - 11) \ times 4[ / tex] [tex]3 \ times ( - 15 + 11)[ / tex] [tex] - 3 + 4 + 7 - 8 \ times 4[ / tex] [tex]4 - 8 - 9 - \ times 2 + 9[ / tex] [tex](90 - 54) \ div 12[ / tex] [tex]15 \ div 5 - (6 - 9 + 8)[ / tex].