Zgjidhja e ushtrimit 4

Thjeshtoni:

1. $x^4\times x^5$
2. $2y^3\times5y$
3. $8a^4\times3a^7$
4. $y^4\times y\times y^8$
5. $x^9:x^3$
6. $\dfrac{35x^8}{40x^2}$
7. $\dfrac{x^{15}}{x^4\times x^2}$
8. $(x^5)^4$