(3x)^3=27x^3
(-2a)^5=-32a^5
(-xy)^8=x^8y^8
(-ab^2)*3=-3ab^2
(-3xy^2)^4=81x^4y^8
(-x^2y^3)^5=-x^10 y^15
(\frac{a}{2})^4=\frac{a^4}{16}
(-\frac{x}{2})^3=-\frac{x^3}{8}
(-\frac{a}{2b})^4=\frac{a^4}{16b^4}
(-\frac{3a^2b^4}{cd^7})^3=-\frac{27a^6b^12}{c^3d^21}