8+(18+7-10×3-15)×(4+7-12)-3×(-9+4×2)-6=
=8+(18+7-30-15)x(-1)-3x(-9+8)-6=
=8+(-20)x(-1)-3x(-1)-6=
=8+20+3-6= 25
@michela_nicastro grazie mille buona serata
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