498. Efectueaza: a) (25 × 11+ (4x25x6-5x75]: 10:5; b) 2+2×3× [(3x8-6x4): 24+24×6]-8; c) [(22 × 14:2-54:3): 8+27x3]:2-16×3; d) [(25 × 16:4+4x179): 8+32 × 6):2-48×3; e) 802-606: 6+[440:4+2x (888:8+3×301): f) 5×140+8x (200:5-72:2)]: (14 × 10:4+ 5); g) 200-5 × [(720:10:9+360:10:6)+30:6×2); h) 19+ 19 × [125+7x (12+ 15×3)-28×2]-100×10; :) (560.7+490+56×0) : [{720-9) (450 45)×11} + 96, j) 6 × (36 × 9+165:3)-(2 484-4x (54:9+360:4)]: 10, k) [35 × 35-(1 000-3 600:6-600:6)]: (86 +210: 15-3×25); 1) (7 350:3-(1 860+4 580:2-600×6)]: (1 765-9×166-171)​