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Q58: A card is drawn from a
Q92: <span class="ql-formula" data-value="\sum _ { i =
Q108: <span class="ql-formula" data-value="\mathrm { r } =
Q136: <span class="ql-formula" data-value="5 x^{2}+3 x y+5 y^{2}=11"><span
Q150: <span class="ql-formula" data-value="x^{2}-8 x y+y^{2}+25=0"><span class="katex"><span class="katex-mathml"><math
Q177: <span class="ql-formula" data-value="2 x^{2}+4 \sqrt{3 x y}+6
Q197: <span class="ql-formula" data-value="\frac { 5 ^ {
Q215: <span class="ql-formula" data-value="a _ { n }
Q251: <span class="ql-formula" data-value="- 6 ( 2 x
Q295: A card is drawn from a