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⇒3*63/5*63 + 1 4*35/9*35 -3*45/7*45
⇒189/315+ 1 140/315 - 135/315
⇒1 194/315
= 1 + 3/5 + 4/9 - 3/7
= 1 + 189/351 + 140/351 + 135/351
= 1+ 329/351 - 135/351
= 1 + 194/351
=1 194/351 (c)