Question 204536
Number 1. 
X = 8 ^ (1/3) = 2 ^ (3 * 1/3) = 2

Number 2. 
e^x^2 = 10^125
x^2 = ln(10^125)
{{{x = sqrt(ln(10^125))}}}

Number 3. 
5 - 2x = 3x + 1
5 - 1 = 3x + 2x
4 = 5x
x = 4/5

Number 4.
{{{log((x+1)/(x-1))=1}}}
{{{(x+1)/(x-1)=10^1}}}
x + 1 = 10*(x- 1)
x + 1 = 10x - 10
1 + 10 = 10x - x
11 = 9x
x = 11/9