[tex]2 < y < 3\\-3 < -y < -2\\-6 < -2y < -4\\-6+1 < -2y+1 < -4+1\\-5 < -2y+1 < -3[/tex]
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[tex]2 < y < 3\\-3 < -y < -2\\-6 < -2y < -4\\-6+1 < -2y+1 < -4+1\\-5 < -2y+1 < -3[/tex]