[23×143-(37×14-256:16)×3]×(32×4×5-8×57)


{[841:(5^2+2^2)-5^2]:2^2+441:21}:2+5^2


18+2×{[72-15×(161:7-19)]×2+(31+390:26):23}


Dau coroană.. Urgent!!