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Spero di leggerla bene, eventualmente conferma o meno:
$\small (5^2×2+5×3-2) - \{[(3^2+2^2-3^0) : 6+1^3]^3×2\} =$
$\small =(25×2+15-2) - \{[(9+4-1) : 6+1]^3×2\} =$
$\small =(50+13) - \{[12 : 6+1]^3×2\} =$
$\small = 63 - \{[2+1]^3×2\} =$
$\small = 63 - \{3^3×2\} =$
$\small = 63 - \{27×2\} =$
$\small = 63 - 54 =$
$\small = 9$