The answer is Estoy because it would be “ Yo ESTOY muy cansado”.

The square (²) can be distributed to each factor inside those parentheses.
3² = 3 × 3 = 9
as for the x^-3, we want to multiply our exponents together, leaving x^-6.

Note that since multiplication is commutative/associative, we can multiply these together in whatever order to simplify.
The x on the right can be rewritten as x¹. Multiply that and x^-6 together to get x^-5. (we just add the exponents)
As for the 9 and -2, multiply those together to get -18.
Now we have

.
Lastly, if you don't want a negative exponent in your answer:
It can be flipped to the bottom because of this property:

This leaves us with
Answer:
Yo <u>voy</u> a la biblioteca.
Nosotros <u>vamos</u> a la piscina.
Mis primas <u>van</u> al gimnasio.
Tú <u>vas</u> de excursión.
Ustedes <u>van</u> al parque municipal.
Alejandro <u>va</u> al museo de ciencias.