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MAA using their own latex package's symbols

Source: 2022 AMC 8 #2

January 26, 2022
AMC 8LaTeX

Problem Statement

Consider these two operations: \begin{align*} a \, \blacklozenge \, b &= a^2 - b^2\\ a \, \bigstar \, b &= (a - b)^2 \end{align*} What is the value of (53)6?(5 \, \blacklozenge \, 3) \, \bigstar \, 6?
<spanclass=latexbold>(A)</span>20<spanclass=latexbold>(B)</span>4<spanclass=latexbold>(C)</span>16<spanclass=latexbold>(D)</span>100<spanclass=latexbold>(E)</span>220<span class='latex-bold'>(A) </span> {-}20\qquad<span class='latex-bold'>(B) </span> 4\qquad<span class='latex-bold'>(C) </span> 16\qquad<span class='latex-bold'>(D) </span> 100\qquad<span class='latex-bold'>(E) </span> 220