Q112: Simplify.<br>- <span class="ql-formula" data-value="\frac{\frac{1}{x^{2}}-\frac{4}{y^{2}}}{4 y-8 x}"><span
Q113: Simplify.<br>- <span class="ql-formula" data-value="\frac{\frac{5}{x+2}+\frac{2}{x}}{\frac{4}{x+2}+\frac{4}{x}}"><span class="katex"><span class="katex-mathml"><math
Q114: Simplify.<br>- <span class="ql-formula" data-value="\frac{y^{2}+3 y-18}{y^{2}+2 y-24}"><span
Q115: Divide and simplify.<br>- <span class="ql-formula" data-value="\frac{z^{2}+12
Q116: Solve the problem.<br>-According to Ohm's law,
Q118: Subtract. Simplify, if possible.<br>- <span class="ql-formula"
Q119: Solve the equation.<br>- <span class="ql-formula" data-value="\frac{x+7}{x-2}=\frac{6}{2-x}"><span
Q120: Subtract. Simplify, if possible.<br>- <span class="ql-formula"
Q121: Simplify.<br>- <span class="ql-formula" data-value="\frac{\frac{1}{m}+\frac{1}{z}}{\frac{1}{m}-\frac{1}{z}}"><span class="katex"><span class="katex-mathml"><math
Q122: Find the LCM.<br>- <span class="ql-formula" data-value="x^{2}+4