{"result":{"text":"table attributes columnalign left end attributes row cell fraction numerator x minus 1 over denominator 2 end fraction equals fraction numerator y plus 1 over denominator negative 1 end fraction equals fraction numerator z minus 3 over denominator 4 end fraction end cell row cell therefore a x plus b y plus c z plus 4 equals 0 end cell row cell rightwards double arrow a minus b plus 3 c plus 4 equals 0 end cell row cell rightwards double arrow a plus 2 b plus c equals 0 end cell row cell therefore 9 minus 4 minus 5 equals 0 end cell end table"},"status":"ok"}