It looks like you have a few quadratic expressions in which some coefficients are missing (represented by "□"). Let's represent these expressions clearly for clarity:
- \( 9x^2 + \square x + 13 \)
- \( -2x^2 + 12x + \square \)
- \( \square x^2 + 5x + 2 \)
Please provide more context or specific instructions about what you would like to do with these expressions. Are you looking to solve for the missing coefficients, factor the expressions, or perform some other operation?