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• How to use it?

• Equation:
• Equation -7x=13-2(8x-7)
• Equation x^4-81=0
• Equation arctg(x/y)
• Equation tg^2(x)+ctg^2(x)+3*(tg(x)+ctg(x))+4=0
• Express {x} in terms of y where:
• 9*x-8*y=6
• 15*x+15*y=16
• 8*x+7*y=-13
• -4*x+18*y=-14
• Canonical form:
• arctg(x/y)
• arctg(x/y)

• Identical expressions

• arctg(x/y)
• arctg(x divide by y)
• arctgx/y