301260:15-425:(112-87)•12

Interpretation: ":" = division, "•" = multiplication. The expression is 301260 ÷ 15 − (425 ÷ (112 − 87)) × 12

Steps:

• 112 − 87 = 25
• 425 ÷ 25 = 17
• 17 × 12 = 204
• 301260 ÷ 15 = 20084
• 20084 − 204 = 19880

Result: 19880

Note: If your notation uses a different precedence, tell me and I’ll re-evaluate.