`d,` `{(2/3)^3.(-3/4)^2.(-1)^5}/{(2/5)^2.(-5/12)^3}`
`={2^3/3^3.(-3)^2/4^2.(-1)}/{2^2/5^2.(-5)^3/12^3}`
`={(2^3. 3^2.(-1))/(3^3. 4^2)}/{(2^2.(-5)^3)/(5^2 .12^3)}`
`={(2^3. 3^2.(-1))/(3^3. 2^4)}/{(2^2.(-5)^3)/(5^2 .2^6. 3^3)}`
`={(-1)/(2.3)}/{(-5)/(2^4 .3^3)}`
`={(-1)/6}/{(-5)/432}`
`=(-1)/6. 432/(-5)`
`=72/5`