Question

What does this mean? xy+(4 [20])>x-5y[2+9-7]

Answer 1

Sometimes people will use square brackets instead of parentheses. So most likely it means the same as:

\[xy + (4(20)) > x - 5y(2 + 9 -7)\]
Or:
\[xy + 4 \times 20 > x - 5y \times (2 + 9 - 7)\]

Answer 2

Based on the quote "I'm still waiting for the day that I will use xy + (4 20) > x - 5y [2+9+7] in real life." What does the equation mean?

Answer 3

'Fraid I'm not sure beyond what I mentioned above. Seems reasonable that some more context is needed to understand what exactly the equation is referring to.