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Exponents show all work please

Simplify  Show work. Make sure that your final answer has no negative exponents
 
(-4m-2n-3)(nm)3
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2 Answers

(-4m^-2n^-3)(nm)^3
-4(m^-2n^-3)(n^3m^3)
-4(m^-2)(m^3)(n^-3)(n^3)
-4[m^(-2+3)][n^(-3+3)]
-4(m^1)(n^0)
-4(m)(1)
-4m is the answer
Theresa,
 
(- 4*m^-2 * n ^-3) / (nm)^3
 
(-4 * 1/m^2 * 1/n^3)  /  n^3 *m^3
 
(-4/m^2*n^3) * 1/ n^3*m^3
 
-4 / m^5* n^6
 
-4*m^-5*n^-6
 
-4m-5n-6