a number squared - x2, nine less than a number - x - 9, four more than a number tripled - 3x+4, six times a number - 6x, half of a number - x/2, nine less a number - 9 - x, four more than a number - x + 4, five less than a number tripled - 3x - 5, seven times a number - 7x, nine more than a number doubled - 2x + 9, one third of a number - x/3, seven less than a number - x - 7,

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