The expression -9 x 7 + -7 can be simplified using the order of operations (PEMDAS) as follows:
-9 x 7 + -7
= (-9) x 7 + (-7) (Multiplication takes precedence over addition)
= -63 + (-7)
= -63 - 7 (Adding a negative is the same as subtracting)
= -70
-9 x 7 + -7
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