a)

$\left(9^2+125:5\right)\cdot 3=\left(81+25\right)\cdot 3=106\cdot 3=318$

$\left(33+5^2+32\right):9=\left(33+25+32\right):9=90:9=10$

$102-2^3\cdot \left(97-85\right)=102-8\cdot 12=102-96=6$

b) 

$303-3\cdot \left(6\cdot 8+48:4\right)=303-3\cdot \left(48+12\right)=303-3\cdot 60=303-180=123$

$130+7\cdot \left(132-10\cdot 12\right)=130+7\cdot \left(132-120\right)=130+7\cdot 12=130+84=214$

$222-2\cdot \left(150-72\right)-2=222-2\cdot 78-2=222-156-2=64$

c)

$\left(47-5\cdot 4\right):3^2=\left(47-20\right):9=27:9=3$

$7^2-\left(20\cdot 12-210\right)=49-\left(240-210\right)=49-30=19$

$\left(7\cdot 6-15\right)\cdot 3-24=\left(42-15\right)\cdot 3-24=27\cdot 3-24=81-24=57$