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• Integral Step by Step
• Derivative Step by Step
• Equation systems Step by Step

• Identical expressions

• x*cos(x) + sin(x) = zero
• x multiply by co sinus of e of (x) plus sinus of (x) equally 0
• x multiply by co sinus of e of (x) plus sinus of (x) equally zero
• xcos(x) + sin(x) = 0
• xcosx + sinx = 0

• Similar expressions

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