How would I go about solving this problem?

(-6x^6)(-6x^2x^6)

collect all the coefficients ad powers:

(-6x^6)(-6x^2x^6)
= (-6x^6)(-6x^8)
= (-6)(x^6)(-6)(x^8)
= (-6)(-6)(x^6)(x^8)
= 36x^14