không shortcode quiz Do: $a=!a!; A+7={tinh: !a!+7}$ <details style="background: #e0f2fe; border: 2px solid #3b82f6; padding: 15px; border-radius: 10px; cursor: pointer; transition: 0.2s;" ontoggle="this.style.borderColor = this.open ? '#9333ea' : '#3b82f6'"><summary style="font-weight: bold; color: #1e3a8a;">Đáp án</summary><p style="margin-top: … [Đọc thêm...] về11 c2 toan 11222-
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