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<html><head><style>.city { background-color: tomato; color: white; padding: 10px;} .main { text-align: center;}</style></head><body><h2>Multiple Classes</h2><p>Here, all three h2 elements belongs to the "city" class. In addition, London also belongs to the "main" class, which center-aligns the text.</p><h2 class="city main">London</h2><h2 class="city">Paris</h2><h2 class="city">Tokyo</h2></body></html>