a:1:{i:0;a:13:{s:2:"id";s:3:"487";s:7:"answer1";s:215:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=A%20%5Ccap%20C%20%3D%20%5C%7B%20-2%2C-1%2C0%2C1%2C2%2C3%5C%7D" alt="A \cap C = \{ -2,-1,0,1,2,3\}" /></p>";s:7:"answer2";s:199:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=A%20%5Ccap%20C%20%3D%20%5C%7B%200%2C1%2C2%2C3%5C%7D" alt="A \cap C = \{ 0,1,2,3\}" /></p>";s:7:"answer3";s:193:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=A%20%5Ccap%20C%20%3D%20%5C%7B%201%2C2%2C3%5C%7D" alt="A \cap C = \{ 1,2,3\}" /></p>";s:7:"answer4";s:201:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=A%20%5Ccap%20C%20%3D%20%5C%7B%20-1%2C0%2C1%2C2%5C%7D" alt="A \cap C = \{ -1,0,1,2\}" /></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:"0001000000";s:8:"question";s:4:"1747";}}