{"status": "success", "data": {"description_md": "**POTD February 27, 2024**\n\nLet $C$ be the coefficient of $x^2$ in the expansion of the product $(1 - x)(1 + 2x)(1 - 3x)\\cdots(1 + 14x)(1 - 15x).$ Find $|C|.$", "description_html": "<p><strong>POTD February 27, 2024</strong></p>&#10;<p>Let <span class=\"katex--inline\">C</span> be the coefficient of <span class=\"katex--inline\">x^2</span> in the expansion of the product <span class=\"katex--inline\">(1 - x)(1 + 2x)(1 - 3x)\\cdots(1 + 14x)(1 - 15x).</span> Find <span class=\"katex--inline\">|C|.</span></p>&#10;", "hints_md": "", "hints_html": "", "editorial_md": "", "editorial_html": "", "flag_hint": "", "point_value": 4, "problem_name": "Problem of the Day #81", "can_next": false, "can_prev": false, "nxt": "", "prev": ""}}