$7·\left(-3\right)-30:\left(-5\right)$

= $-21+6$

= $-15$

$\left(-42-7\right):\left(\left(-8-20\right):4\right)$

= $-49:\left(\left(-8-20\right):4\right)$

= $-49:\left(-28:4\right)$

= $-49:\left(-7\right)$

= $7$

$-1+(-28+3-\left(-2\right)·6)$

= $-1+\left(-25+12\right)$

= $-1-13$

= $-14$

$35:5-\left(-36-\left(-7\right)+11\right):\left(-2\right)$

= $7-\left(-36+7+11\right):\left(-2\right)$

= $7-\left(-29+11\right):\left(-2\right)$

= $7-\left(-18:\left(-2\right)\right)$

= $7-9$

= $-2$