log₇7  log₀,₃1  log₆36  log⅕5  log₅100-log₅4  2log5+log4  log₆4+log₆3  log₃2+2log₃4  log12-log⅚  log₄2x+logx-log₄3x

log₇7 = 1    log₀,₃1 = 0    log₆36 = 2   log⅕5 = -1    log₅100-log₅4 = log₅(100/4) = log₅(25) = 2    log₆4+log₆3 = log₆ (12)    log₃2+2log₃4 = log₃2+log₃16 = log₃ (32)