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Simplify the expression. Assume all variables represent nonzero real numbers.
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Q13: <span class="ql-formula" data-value="- 8 \sqrt { 5
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Q383: <span class="ql-formula" data-value="x ^ { 2 /
Q394: <span class="ql-formula" data-value="\frac { 1 } {
Q396: Let <span class="ql-formula" data-value="\mathrm {
Q472: <span class="ql-formula" data-value="25 x ^ { 2
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