1) (V10+3)/(V10-3)+(V10-3)/(V10+3)=((V10+3)^2+(V10-3)*2)/(V10)^2-3^2= ((V10)^2+2*3*V10+3^2)+((V10^2-23V10+3^2)/(10-9)=(10+9+10+9)/1=38