i,(2/15-1/3)-3$\frac{1}{2}$+(-3/5)^5:(-3/5)^3 n, (1+3/2-1/6)^2:(2-5/9) p, 3^4.5-3^6/3^4.13+3^4

i) `(2/15 - 1/3) - 3 1/2 + (-3/5)^5 : (-3/5)^3`

`= (2/15 - 1/3) - 7/2 + (-243)/3125 : (-27)/125`

`= -1/5 - 7/2 + (-243)/3125 : (-27)/125`

`= -1/5 - 7/2 + 9/25`

`= -37/10 + 9/25`

`= -167/50`

`------`

n) `(1 + 3/2 - 1/6)^2 : (2 - 5/9)`

`= (7/3)^2 : 13/9`

`= 49/9 : 13/9`

`= 49/13`

`------`

p) `(3^4. 5 - 3^6)/(3^4. 13 + 3^4) = (3^4. 5 - 3^4. 3^2)/(3^4. (13 + 1)) = (3^4. (5 - 9))/(3^4. 14) = -4/14 = -2/7`

hoặc:

p) `3^4. 5 - 3^6/3^4. 13 + 3^4`

`= 3^4. (5 + 1) - 3^2`

`= 3^4. 6 - 3^2`

`= 3^2. (3^2. 6 - 1)`

`= 9. (9. 6 - 1)`

`= 9. 53`

`= 477`