berapa hasil nya..tolong berikan cara pengerjaan nya

log(10)^5 + log 25 + log 4
=log{(10)^5 . 25 . 4}
=log{(10)^5. (10)^2}
=log(10)^7
=7
2. 1/5log(1/625)
= 1/5log{(1/5)^4}
=4
3. 49log343
log343/log49
=log(7)^3/log 7^2
=3.log7/2.log7
=3/2
semoga membantu....!