Question

25-[20-{8/4-(15-25/5)/2}]

Answer 1

25-[20-{8/4-(15-5)/2}]
25-[20-{2-10/2}]
25-[20-{2-5}]
25-[20-{-3}]
25-[20+3]
25-23
2

Answer 2

$25 - (20 - (8 \div 4 - (15 - 25 \div 5) \div 2))$
$25 - (20 - (8 \div 4 - (15 - 5) \div 2))$
$25 - (20 - (8 \div 4 - 10 \div 2))$
$25 - (20 - (2 - 5))$
$25 - (20 - ( - 3))$
$25 - (20 + 3)$
$25 - 23$
$2$