    <a href="../../4-Linear-Methods-for-Classification/ex4-7/" class="md-nav__link">
        Ex. 4.7
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      <a href="../../4-Linear-Methods-for-Classification/ex4-8/" class="md-nav__link">
        Ex. 4.8
      </a>
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    <li class="md-nav__item">
      <a href="../../4-Linear-Methods-for-Classification/ex4-9/" class="md-n