Simplifyand express each of the following in exponential form:
(i) 23×34×43×32
(ii) (523×54)÷57
(iii) 254÷53
(iv) 3×72×11821×113
(v) 3734×33
(vi) 20+30+40
(vii) 20×30×40
(viii) (30+20)×50
(ix) 28×a543×a3
(x) a5a3×a8
(xi) 45×a8b345×a5b2
(xii) (23×2)2