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• Identical expressions

• - one hundred and twenty-eight *cos(four *x) = zero
• minus 128 multiply by co sinus of e of (4 multiply by x) equally 0
• minus one hundred and twenty minus eight multiply by co sinus of e of (four multiply by x) equally zero
• -128cos(4x) = 0
• -128cos4x = 0

• Similar expressions

• 128*cos(4*x) = 0