a:1:{i:0;a:13:{s:2:"id";s:3:"482";s:7:"answer1";s:404:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=A%20%5Csetminus%20B%20%3D%20%5C%7B%20a%2Cb%2Cc%20%5C%7D" alt="A \setminus B = \{ a,b,c \}" />, <img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=B%20%5Csetminus%20A%20%3D%20%5C%7B%20d%2Ce%20%5C%7D" alt="B \setminus A = \{ d,e \}" /></p>";s:7:"answer2";s:398:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=A%20%5Csetminus%20B%20%3D%20%5C%7B%20d%2Ce%20%5C%7D" alt="A \setminus B = \{ d,e \}" />, <img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=B%20%5Csetminus%20A%20%3D%20%5C%7B%20d%2Ce%20%5C%7D" alt="B \setminus A = \{ d,e \}" /></p>";s:7:"answer3";s:420:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=A%20%5Csetminus%20B%20%3D%20%5C%7B%20a%2Cb%2Cc%20%5C%7D" alt="A \setminus B = \{ a,b,c \}" />,<img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=B%20%5Csetminus%20A%20%3D%20%5C%7B%20f%2Cg%2Ch%2Ci%2Cj%20%5C%7D" alt="B \setminus A = \{ f,g,h,i,j \}" /></p>";s:7:"answer4";s:451:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=A%20%5Csetminus%20B%20%3D%20%5C%7B%20a%2Cb%2Cc%2Cf%2Cg%2Ch%2Ci%2Cj%20%5C%7D" alt="A \setminus B = \{ a,b,c,f,g,h,i,j \}" />, <img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=B%20%5Csetminus%20A%20%3D%20%5C%7B%20a%2Cb%2Cc%2Cf%2Cg%2Ch%2Ci%2Cj%20%5C%7D" alt="B \setminus A = \{ a,b,c,f";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:"0010000000";s:8:"question";s:4:"1742";}}