[tex]\displaystyle 1)(n-m)(-2,4p)=-2,4np-m(-2,4p)=-2,4np+2,4mp\\\\2)-(5c-d)+(4d+5c)=-5c+d+4d+5c=5d[/tex]
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[tex]\displaystyle 1)(n-m)(-2,4p)=-2,4np-m(-2,4p)=-2,4np+2,4mp\\\\2)-(5c-d)+(4d+5c)=-5c+d+4d+5c=5d[/tex]