[1+(1/11+1/13+1/17）]x[(1/11+1/13+1/17)+1/19]=(1/11+1/13+1/17)+(1/11+1/13+1/17)^2+1/19+(1/11+1/13+1/17)/19[1+(1/11+1/13+1/17)+1/19]x(1/11+1/13+1/17)= (1/11+1/13+1/17)+(1/11+1/13+1/17)^2+(1/11+1/13+1/1...