\(\frac{\frac{49}{63} \div \frac{21}{9}-\frac{85}{510}+\frac{88}{132} \div \frac{66}{11}}{\frac{1}{7} \div \frac{33}{21}+\frac{26}{143}-\frac{1}{209} \div \frac{1}{19}}\) મૂલ્ય શું છે?