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• Identical expressions

• two *sign(two *x - three) = zero
• 2 multiply by sign(2 multiply by x minus 3) equally 0
• two multiply by sign(two multiply by x minus three) equally zero
• 2sign(2x - 3) = 0
• 2sign2x - 3 = 0

• Similar expressions

• 2*sign(2*x + 3) = 0