Okay, here we have this:
Considering the provided expression, we are going to simplify it, so we obtain the following:
45+3(-5 + 9)
=45+(-5*3 + 9*3)
=45+(-15 + 27)
=45-15 + 27
=30 + 27
=57
Finally we obtain that the expression is equal to 57.
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