498. Efectuează: a) [25 x 11+ (4 x 25 x 6-5 x 75)]: 10:5; b) 2+2 x 3 x [(3x 8-6x4): 24+24 x 6] - 8; c) [(22 x 14:2-54:3): 8+27 x 3]: 2-16 × 3; d) [(25 x 16:4+ 4 x 179): 8+32 x 6]: 2 - 48 x 3; e) 802-606: 6+ [440 : 4 + 2 x (888:8 + 3 x 30)]; f) 5 x [40 + 8x (200:5-72: 2)]: (14 × 10:4+ 5); g) 200-5x [(720: 10:9 + 360: 10:6) + 30 : 6 × 2]; h) 19 + 19 × [125 + 7 x (12 + 15 x 3) - 28 × 2] - 100 × 10; i) (560 : 7 + 4 × 90 +56 × 0): [(720: 9): (450:45) × 11] +96; j) 6x (36 x 9 + 165 : 3) - [2 484-4x (54:9 + 360 :4)]: 10; k) [35 x 35 - (1 000 - 3 600 : 6-600:6)]: (86 +210: 15-3 x 25); 1) [7 350 : 3 (1 860 +4 580 : 2 - 600 × 6)]: (1 765-9 x 166-171); -​