New posts in Exponential Sum

Find all positive integers $a, b, c$ such that $21^a+ 28^b= 35^c$ .

Sum of exponential terms and binomial

exponential equation: $6^x+8^x+15^x=9^x+10^x+12^x$

Prove the following series $\sum\limits_{s=0}^\infty \frac{1}{(sn)!}$

Find all real solutions of $6^x+1=8^x-27^{x-1}$