question: How many more cases of heart disease is TX expected to see in 2030 compared with 2010?
#1 return TX 
#2 return expected cases of heart disease in  2030 of  #1 
#3 return expected cases of heart disease in  2010 of  #1 
#4 return number of  #2 
#5 return number of  #3 
#6 return the  difference of #4 and  #5