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• Identical expressions

• -(x*cos(x) + two *sin(x))/ six = zero
• minus (x multiply by co sinus of e of (x) plus 2 multiply by sinus of (x)) divide by 6 equally 0
• minus (x multiply by co sinus of e of (x) plus two multiply by sinus of (x)) divide by six equally zero
• -(xcos(x) + 2sin(x))/6 = 0
• -xcosx + 2sinx/6 = 0
• -(x*cos(x) + 2*sin(x)) divide by 6 = 0

• Similar expressions

• -(x*cos(x) - 2*sin(x))/6 = 0
• (x*cos(x) + 2*sin(x))/6 = 0
• -(x*cosx + 2*sinx)/6 = 0