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Q21: A lottery game contains 22 balls
Q27: Let <span class="ql-formula" data-value="\mathrm {
Q46: <span class="ql-formula" data-value="6 x ^ { 2
Q57: <span class="ql-formula" data-value="A = \left| \begin{array} {
Q85: <span class="ql-formula" data-value="\frac { 9 x ^
Q109: Given an arithmetic sequence with d
Q110: 3 + 6 + 9 + .
Q162: <span class="ql-formula" data-value="4 + \frac { 4
Q200: <span class="ql-formula" data-value="\frac { 1 - \frac
Q222: 3x + 2y = -4 5x =