commons-math-core/src/main/java/org/apache/commons/math4/core/jdkmath/AccurateMath.java [2756:2773]:
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        double temp = x * HEX_40000000;
        final double xa = x + temp - temp;
        final double xb = x - xa;

        /* Square it */
        double ya = xa * xa;
        double yb = xa * xb * 2.0 + xb * xb;

        /* Subtract from 1 */
        ya = -ya;
        yb = -yb;

        double za = 1.0 + ya;
        double zb = -(za - 1.0 - ya);

        temp = za + yb;
        zb += -(temp - za - yb);
        za = temp;
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commons-math-core/src/main/java/org/apache/commons/math4/core/jdkmath/AccurateMath.java [2832:2849]:
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        double temp = x * HEX_40000000;
        final double xa = x + temp - temp;
        final double xb = x - xa;

        /* Square it */
        double ya = xa * xa;
        double yb = xa * xb * 2.0 + xb * xb;

        /* Subtract from 1 */
        ya = -ya;
        yb = -yb;

        double za = 1.0 + ya;
        double zb = -(za - 1.0 - ya);

        temp = za + yb;
        zb += -(temp - za - yb);
        za = temp;
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