Determine if the expression - 8n ^ 2 * m ^ 4 + 9m ^ - 1 * n ^ 2 + 6n ^ 4 * is a polynomial or not. If it is a polynomial, state the type and degree of the polynomial.

Determine if the expression 8n 2 m 4 9m 1 n 2 6n 4 is a polynomial or not If it is a polynomial state the type and degree of the polynomial class=