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[tex](-17)+23=23+(-17)=23-17=\boxed6\\\\(-32)+46=46+(-32)=46-32=\boxed{14}\\\\18-24=-(24-18)=\boxed{-6}\\\\(-56)+(-34)=-(56+34)=\boxed{-90}\\\\(-35)-24=-(35+24)=\boxed{-59}\\\\(-24)-(-18)=(-24)+18=-(24-18)=\boxed{-6}[/tex]