#39;, 'Q' denotes '$\times#39;, 'R' denotes '$+#39;, and 'S' denotes '$-#39;, then what is $18\ Q\ 12\ P\ 4\ R\ 5\ S\ 6$?... Explore step-by-step solution, answer key, and exam analytics on GATE AG Prep Portal." /> #39;, 'Q' denotes '$\times#39;, 'R' denotes '$+#39;, and 'S' denotes '$-#39;, then what is $18\ Q\ 12\ P\ 4\ R\ 5\ S\ 6$?... Explore step-by-step solution, answer key, and exam analytics on GATE AG Prep Portal." />