$8^2$$12^2$$2^4$$a^3$$5^2$$9^2 \times 9=9^3$$3^2\times y^3=3^2y^3$$(3y)^3$$3\times y^2=3y^2$$10^2 \times x^2=10^2x^2$$2^2$$4^2 \times 4^3= 4^5$
