a:1:{i:0;a:13:{s:2:"id";s:3:"523";s:7:"answer1";s:193:"<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%7Bx%5E3%2Bx%7D%7Bx%5E2%2B1%7D" alt="f(x)=\frac{x^3+x}{x^2+1}" /></p>";s:7:"answer2";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%7B1%2Bx%7D%7B1-x%7D" alt="f(x)=\frac{1+x}{1-x}" /></p>";s:7:"answer3";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%7Cx%7C%7D%7Bx%7D%2Bx%5E2" alt="f(x)=\frac{|x|}{x}+x^2" /></p>";s:7:"answer4";s:215:"<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%2Bx)%5E3(1%2Bx)%5E3%7D%7Bx%5E2%2B2%7D" alt="f(x)=\frac{(1+x)^3(1+x)^3}{x^2+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:"1783";}}