Evaluate rs+14srs+14sr, s, plus, 14, s when r=6r=6r, equals, 6 and s=\dfrac14s= 4 1 s, equals, start fraction, 1, divided by, 4, end fraction.

 For this case we have the following mathematical expression:
 
 Where, the variables of the expression are given by:
 
 Substituting the variables in the given expression we have:
 
 Rewriting the expression we have:
 
 Simplifying we have:
 
 
 When evaluating rs + 14s with r = 6 and s = 1/4, the result is 5.

Then just do it (lol)

Answers4.) -1/205.) -1/406.) -55/127.) -3/4