Four letter-clusters have been given out of which three

? = (6.1 × 64.93 ÷ 12.86) ^1.97 – 49.98% of 359.77

431.98 + ? – 15.04 = 864.93 – 368.01

45.1298% of (14.03² - 75.98) + 27.87% of √40001 = 449.98% of 24.098 - ? 

30.05% of 360.05 – 25.15% of 99.99 × 3.02 = ?

647.1 ÷ ? + 72.3 × 209.81 – 8743.1 = 6404

244.98% of 189.98% of 599.99 + 199.98 = ?

(74.93% of 640.11 + 3/4 of 359.79)² - (1/3 of 80.87 × 2)² = ?

(439.98 ÷ 10.99) × 23.98= ? × (23.98) 2 ÷ 47.98

126.003 × 11.987 + 23.04 × 12.96 = ?

234.19 + 17.92 - 12.19 × 7.5 + 44.92% of 119.96 = ?