(10/13)÷(63/22)-(2/5)×(11/13)+7+(1/5)×(22/63)
=(10/13)×(22/63)-(2/5)×(11/13)+7+(1/5)×(22/63)
=(1/13)×[(10×22/63-(2/5)×11]+7+(1/5)×(22/63)
=(1/13)×(220/63-22/5)+7+(1/5)×(22/63)
=(1/13)×(1100-1386)/(63×5)+7+(1/5)×(22/63)
=(1/13)×(-286)/(63×5)+7+22/(63×5)
=(1/13)×[1/(63×5)](-286+22)+7
=-264/(63×5×13)+7
=(-264+7×63×5×13)/(63×5×13)
=28401/4095
=9467/1365