Simplify: A=5×7÷7of5−9÷3of3×(9−6)+4×5÷8of314A=5×7÷7of5−9÷3of3×(9−6)+4×5÷ 8of341 B=232÷454of323B=223÷445of332 A÷BofA−1A÷BofA−1