Create better lessons quicker
3+15 - 18, 7+5 - 12, 8+9 - 17, 7+7 - 14, 23+7 - 30, 20+6 - 26, 51+6 - 57, 12+16 - 28, 2+13 - 15, 41+3 - 44, 25+14 - 49, 31+7 - 38, 12+7 - 19, 20+20 - 40, 26+21 - 47, 15+20 - 35, 1+10 - 11, 19+1 - 20, 40+2 - 42, 34+5 - 39,

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