Simplify the following: (i) `(4+5)^-1-(6+8)^-1`

Simplify the following: (-5i)(1/8i)

Simplify the following: (8i) (- 1/8 i)

Simplify the following: i^6+i^8

Simplify the following (5)/(i^(3))

Simplify the following: (-i)(2i)(- 1/8i)^3

Simplify each of the following: (i)\ (625)^(-1/4) (ii)\ ((256)/(81))^(5/4)

Simplify the following : (i) 1+ i^(5)+i^(10)+i^(15) (ii) (1+i)^(4)+(1+(1)/(i))^(4) (iii) i^(n)+i^(n+1)+i^(n+2)+i^(n+3)

Simplify the following (2−5i)+(−3+4i)+(8−3i)

Simplify each of the following: (i) (16)^(1/5)xx(2)^(1/5) (ii) (243)^(1/ 4)/(3)^(1/ 4)

Simplify the following : (i) (-7)+(-6)div2-{(-5)xx(-4)-(3-5)} (ii) 121div{17-{15-3(8-5)}] .