Expression 12: "x" squared minus "y" equals 43x2−y=43
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Expression 13: "y" minus "x" equals 13y−x=13
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Expression 14: "x" cubed "y" plus "y" "x" equals 2x3y+yx=2
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Expression 15: "y" cubed "x" plus "x" "y" equals 2y3x+xy=2
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Expression 16: floor left parenthesis, StartFraction, "x" minus 1 Over mod left parenthesis, "x" minus 1 , 26 , right parenthesis plus 1 , EndFraction , right parenthesis plus 6 equals "y"floorx−1modx−1,26+1+6=y
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Expression 17: "x" positive "y" equals 19x+y=19
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Expression 18: "x" squared plus "y" squared equals 74x2+y2=74