long math

1.ln 7 + ln (n - 2) = ln 6n

2.log516 - log52t = log52

3.log5m = log5125

4.logy = log16 + log49

5.log6(b2 + 2) + log62 = 2

6.log3(5x+5) - log3(x2 - 1) = 0

7.log2(x - 2) + 5 = 8 - log2 4