5-3*3-86*4325-34+5432=-366 556

You’re right—the left-hand side equals -366,556.

Calculation:

• 3 × 3 = 9
• 86 × 4325 = 371,950
• 5 − 9 − 371,950 − 34 + 5,432
  • 5 − 9 = -4
  • -4 − 371,950 = -371,954
  • -371,954 − 34 = -371,988
  • -371,988 + 5,432 = -366,556

So 5 - 33 - 864325 - 34 + 5432 = -366,556, which matches the right-hand side. If you want, I can show similar checks with more examples.