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Gr2_1-step (24 - 7 = __)
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Gr2_1-step (25 - __ = 18)
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Gr2_1-step extra info (18 + 14 = __)
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Gr2_1-step with extra info (28 + __ = 75)
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Gr2_2-step (85 - 14 - 14 = n)
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Gr2_One-step (__ - 6 = 20)