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Q42: <span class="ql-formula" data-value="\left\{ \begin{array} { r }
Q43: <span class="ql-formula" data-value="\left\{ \begin{aligned}3 y & =
Q53: <span class="ql-formula" data-value="( 4 x + 9
Q69: <span class="ql-formula" data-value="\left\{ \begin{array} { l }
Q88: <span class="ql-formula" data-value="\left\{\begin{array}{l}2 x+5 y>15 \\x-2 y<-4\end{array}\right."><span
Q88: <span class="ql-formula" data-value="\frac { 3 x -
Q180: <span class="ql-formula" data-value="\left( \frac { 2 }
Q185: <span class="ql-formula" data-value="\frac { - 20 x
Q243: <span class="ql-formula" data-value="\frac { x ^ {
Q315: <span class="ql-formula" data-value="5 x ( 8 x