ANSWER ＩＴ WITHIN ＴＷＯ MINUTES (DO NOT USE CALCULATOR)
Algebra
Level
pending
1) -a+b(b+ - c-d+e-f+g+h-i-j+k-l+m+n+o) =? a=1 b=2 c=3 d=4 e=5 f=6 g=7 h=8 i=9 j=10 k=11 l=12 m=13 n=14 o=15 o=15
The answer is 79507.
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1 solution
-1+2(2+12-3-4+5-6+7+8-9-10+11-12+13+14+15)^3 (-1+2=1) , add on the numbers in the brackets = 43 43^3=79507