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(-8)-(15)+(-9)-(-12) 3/5-3/2+(-11/4)+13/4
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(-8)-(15)+(-9)-(-12)
=-8-15-8+12
=-23-8+12
=-31+12
=-19
3/5-3/2+(-11/4)+13/4
=3/5-3/2-11/4+13/4
=3/5-3/2+(13/4-11/4)
=3/5-3/2+1/2
=3/5-1
=-2/5
=-8-15-8+12
=-23-8+12
=-31+12
=-19
3/5-3/2+(-11/4)+13/4
=3/5-3/2-11/4+13/4
=3/5-3/2+(13/4-11/4)
=3/5-3/2+1/2
=3/5-1
=-2/5
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