Question

Simplify $2(3b-5a)-7[9-62-5(a-6)]$

Answer 1

$=2(3b-5a)-7[9-62-5(a-6\left)\right]$

$=6b–10a–(63–434–35(a–6\left)\right)$

$=6b–10a–(63–434–35a–210)$

$=6b–10a–63+434+35a+210$

$=25a+6b+581.$