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• Identical expressions

• -(sin(x) - four *sin(two *x)) = zero
• minus ( sinus of (x) minus 4 multiply by sinus of (2 multiply by x)) equally 0
• minus ( sinus of (x) minus four multiply by sinus of (two multiply by x)) equally zero
• -(sin(x) - 4sin(2x)) = 0
• -sinx - 4sin2x = 0

• Similar expressions

• -(sin(x) + 4*sin(2*x)) = 0
• (sin(x) - 4*sin(2*x)) = 0
• -(sinx - 4*sin(2*x)) = 0