100
25
8
1
4
4
Target:641
qwen/qwen3.8-flash
25*((100+4)/4)-(8+1)
= 641
Correct
anthropic/claude-haiku-5.5
8*4*(100/25)*(4+1)
= 640
Incorrect
openai/gpt-6-luna
8 * (100 - (25 - (4 + 1)))
= 640
Incorrect
openai/gpt-5.6-luna
8 * (100 - 25 + 4 + 1)
= 640
Incorrect
meta/muse-spark-1.2-contributor
(8*4)*(100/(25/(4+1)))
= 640
Incorrect