If `|x| gt 1` then expand `(1+x)^(-2)`

Expand (1-2 x)^5

Expand (x+1/x)^6

Expand (1-x+x^2)^4

Expand (x/3+1/x)^5

Expand (2/x-x/2)^5

Find the sum of the last 30 coefficients in the expansion of (1+x)^(59) , when expanded in ascending powers of x.