# Chapter 5 - Section 5.2 - More Work with Exponents and Scientific Notation - Exercise Set: 90

$-3m-15$

#### Work Step by Step

We are given the expression $12m-14-15m-1$. We can simplify by grouping like terms. $(12m-15m)+(-14-1)=(12m-15m)-(14+1)=-3m-15$

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