To multiply the expression, we simplify and combine like terms. The final expression is x^4-85x^2+1764. The variable restrictions are x = -6 and x = -7.
To multiply the given expression, we can cancel out common factors and simplify the remaining terms. The expression can be written as (x-6)(x+6)(x-7)(x+7). Multiplying the binomials, we get (x^2-36)(x^2-49). Expanding this further, we have x^4-36x^2-49x^2+1764. Combining like terms, the final simplified expression is x^4-85x^2+1764.
The variable restrictions for this expression occur at x = -6 and x = -7, as they would result in division by zero.
Learn more about Multiplying Polynomials