`2-:[{(18xx2)-6}-:3]-2+[{(21xx5)-5}-:10]`

Verify the following:(a) 18xx[7+(-3)]=[18xx7]+[18xx(-3)] (b) (-21)xx[(-4)+(-6)]=[(-21)xx(-4)]+[(-21)xx(-6)]

(1/4xx2/3)xx5/6=...xx(2/3xx5/6)

Verify the following: (a) 18xx[7+(-3)]=[18xx7]+[18xx(-3)](-21)xx[(-4)+(-6)]=[(-21)xx(-4)]+[(-21)xx(-6)]

5.2 xx 2.1

3^(3.5)xx21^(2)xx42^(2.5)-:2^(2.5)xx7^(3.5)=21^(?) a.6.5 b.8 c.10 d.12.5 e.None of these

21xx7+3xx44-5-6xx7

5sqrt21xx6sqrt10

(2/5)xx(-3/7)-1/6xx3/2+1/14xx2/5