bonjour
5 x + 15 = 5 ( x + 3 )
7 y² - 2 y = y ( 7 y - 2 )
a - 5 a² = a ( 1 - 5 a )
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bonjour
5 x + 15 = 5 ( x + 3 )
7 y² - 2 y = y ( 7 y - 2 )
a - 5 a² = a ( 1 - 5 a )