a:1:{i:0;a:13:{s:2:"id";s:3:"616";s:7:"answer1";s:189:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=f'(x)%3D%5Cfrac%7B-7%7D%7B(3x-2)%5E2%7D" alt="f'(x)=\frac{-7}{(3x-2)^2}" /></p>";s:7:"answer2";s:189:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=f'(x)%3D%5Cfrac%7B-1%7D%7B(3x-2)%5E2%7D" alt="f'(x)=\frac{-1}{(3x-2)^2}" /></p>";s:7:"answer3";s:171:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=f'(x)%3D%5Cfrac%7B2%7D%7B3%7D" alt="f'(x)=\frac{2}{3}" /></p>";s:7:"answer4";s:179:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=f'(x)%3D%5Cfrac%7B-7%7D%7B3x-2%7D" alt="f'(x)=\frac{-7}{3x-2}" /></p>";s:7:"answer5";s:0:"";s:7:"answer6";s:0:"";s:7:"answer7";s:0:"";s:7:"answer8";s:0:"";s:7:"answer9";s:0:"";s:8:"answer10";s:0:"";s:4:"good";s:10:"1000000000";s:8:"question";s:4:"1876";}}