simplify

1.(x^m+2)(x^-2)(x^m-5)

:)
(x^m+2)(x^-2)(x^m-5)

= (x^m + 2)x^(m-7)

Used law of exponents for x powers

= x^m x^(m-7) + 2x^(m-7)

Used distributive law

= x^(2m-7) + 2x^(m-7)

That is the answer