(-5)^14/((-5)^4)^3 - ((-3)^2 - 15 - (-2)^3 + (-5)^2)=
=5^14/5^12 - (3^2 - 15 - (- 2^3) + 5^2)=
=25 - (9 - 15 + 8 + 25)=
=25 - 27 = -2
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