Whenever you mutiply 2 or more terms with the same base you can add the exponents. whenever you divide 2 or more terms with the same base you can subtract the exponents.
whenever u have an exponent expression that is raised to a power you can mutiply the exponent and power.
using the basic exponent rules above simplify each expression.

4²· 4⁷=
3⁴· 3⁶=
5 · 5²=
y⁴ · y=
(xy)²(xy)⁴ =
2³ · 2⁵ · 2=
(3²)4=
(5⁻²)³ =
(-3⁴)⁻² =
(y⁻²)⁰ =
(9⁰)³ =
(y⁴)⁴ =
(⁻5³)⁷ =
x³·x⁸ =
(4⁻²)⁻⁵ =
3⁰ · 3⁵ =