5m Zen
If x is an
If x is an pictures 5
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If x is
If x is an
if x is an integer satisfying x^2-6x+5
if x is an even number
if x is an integer and yu003d-2x-8
if x is an integer then x^2 is an integer
if x is an integer then u2013x is positive
if x is an integer and 2x^2+9 9x
