{ "item_title" : "Practice by Subject", "item_author" : [" Xing Zhou "], "item_description" : "Practice makes perfect. This book contains 100 problems focusing on binomial expansion (including multinomial expansion) and combinatorial identities (such as hockey stick identity, Vandermonde identity and so on). In addition to introducing these theorems and identities themselves, this book also discusses various typical problems and techniques that are related to these two topics. For more information, please visit https: //www.mathallstar.org/.", "item_img_path" : "https://covers1.booksamillion.com/covers/bam/1/79/455/555/1794555552_b.jpg", "price_data" : { "retail_price" : "24.99", "online_price" : "24.99", "our_price" : "24.99", "club_price" : "24.99", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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