Solutions by everydaycalculation.com
230 - 1030 is -415.
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Related: 4/30-10/30 2/30-20/30 2/60-10/30 2/30-10/60 6/30-10/30 2/90-10/30 2/30-10/90 10/30-10/30 2/30-50/30 14/30-10/30 2/30-70/30
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