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x in (-oo:+oo)
x = 65/3-(-210*3) // - 65/3-(-210*3)
x-(65/3)-210*3 = 0
x-65/3-210*3 = 0
x-1955/3 = 0 // + 1955/3
x = 1955/3
x = 1955/3
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