Difficult: grumbling, getting upset, tough, complicated, complex, 7,999 + 6,376, reading tests, count by 7s, hard, not easy, crumple the paper, add or subtract with regrouping, 1,000-1=, drawing a cube, ask for help, writing in English, Non-difficult: 1+1=, count by 2s, count by 5s, count by 10s, easy, drawing a circle, drawing a square, fold a paper in 2 parts, add or subtract without regrouping,

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