Practice Problems: Solve the following problems involving exponential and logarithmic functions. Provide step-by-step solutions.
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- Calculate the value of 252^525.
- Simplify the expression log3(81)\log_3(81)log3(81).
- Solve the equation 3x=813^x = 813x=81.
Complete all three above, save them into one .pdf, and upload them when complete.