{ ( cos ^-1x { √(1-x^2) }]^-1) ÷ ( log e { 1 + ( sin(2x√(1-x^2)) ÷ 2) }) dx
{ ( cos ^-1x { √(1-x^2) }]^-1) ÷ ( log e { 1 + ( sin(2x√(1-x^2)) ÷ 2) }) dx

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