Please interpret the mathematical expression written on the grid paper.

The mathematical expression appears to be -36x⁴ + 66x² - 3x.

Breakdown:

• -36x⁴: This is a term with a coefficient of -36 and x raised to the power of 4.
• + 66x²: This is a term with a coefficient of 66 and x raised to the power of 2.
• - 3x: This is a term with a coefficient of -3 and x raised to the power of 1.

This is a polynomial expression.