{[(18-4x5)x(-2)^2]^3÷[(-2)^2]^3}-[7x(5-3)]^2÷[(2)^5-(-5)^2]^2
{[(18-4x5)x(-2)^2]^3÷[(-2)^2]^3}-[7x(5-3)]^2÷[(2)^5-(-5)^2]^2
177)
$\{[(18-4×5)×(-2)^2]^3÷[(-2)^2]^3\}-[7×(5-3)]^2÷[(2)^5-(-5)^2]^2=$
$=\{[(18-20)×4]^3÷(-2)^{2×3}\}-[7×2]^2÷[32-25]^2=$
$=\{[(-2)×4]^3÷(-2)^6\}-[14]^2÷[7]^2=$
$=\{[-8]^3÷64\}-2^2=$
$=\{(-512)÷64\}-4=$
$=-8-4=$
$= -12$