Requirements: more than 4 steps I hope there is a process

Requirements: more than 4 steps I hope there is a process

(1)3643-74+6357-76=9850(2)39×24+39×46+39×30=3900(3)108×35=3780(4)345×98=33810(5)25×64×125×5=1000000(6)8500÷25=340(7)94×73+27×94=9400(8)125×79=9875(9)1.2×99=118.8(10)9...