What's the answer to 2+{8-2[32+5(1+2)]}

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

Has a picture and need within 5 min