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2*x-x^2+4 < 1;x
x
2*ln(x)+(1*(2/(15^(1/2))))/tan((2*x+1)/(15^(1/2)))
abs(2*x-x^2+4) < 1;x
x
2*x-x^2+4 < 1;x
x
2*x-x^2-4 < 1;x
x
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