$-7-\left(-5\right)-\left(-10-4\right)$

= $-7+5-1·\left(-14\right)$

= $-2+14$

= $12$

$-90:\left(-9\right)-\left(21-4\right)+30:\left(-5\right)$

= $10-\left(21-4\right)-6$

= $10-1·17-6$

= $10-17-6$

= $-7-6$

= $-13$

$(2+14:\left(-12:\left(-24-\left(-18\right)\right)\right)):\left(-9\right)$

= $(2+14:\left(-12:\left(-24+18\right)\right)):\left(-9\right)$

= $(2+14:\left(-12:\left(-6\right)\right)):\left(-9\right)$

= $(2+14:2):\left(-9\right)$

= $\left(2+7\right):\left(-9\right)$

= $9:\left(-9\right)$

= $-1$