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    <meta charset="UTF-8">
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    <title>Circle Equation Calculator</title>
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<body>
    <div class="container">
        <h1>Circle Equation Calculator</h1>
        <h2>x² + y² + Dx + Ey + F = 0</h2>
        <!-- Input group for coefficients of the circle equation -->
        <div class="input-grp">
            <label for="d">D (coefficient of x