a:1:{i:0;a:13:{s:2:"id";s:3:"693";s:7:"answer1";s:163:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B4%7D%7B%5Cpi%7D" alt="\frac{4}{\pi}" /></p>";s:7:"answer2";s:183:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B%5Cpi%7D" alt="\frac{\sqrt{2}}{\pi}" /></p>";s:7:"answer3";s:183:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B%5Cpi%7D%7B%5Csqrt%7B2%7D%7D" alt="\frac{\pi}{\sqrt{2}}" /></p>";s:7:"answer4";s:163:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B%5Cpi%7D%7B4%7D" alt="\frac{\pi}{4}" /></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:"1953";}}