Sn = n^2 + 5n + 94 and K = S6 – S5 - S4 + S3 + S2 – S1. What is the value of K? Choose the correct choice:
A) 12 B) 50 C) 45 D) 41 E) 36
I used brute force for this question:   S6: 36+30+94=160   S5: 25+25+94=144   S4: 16+20+94=130   S3: 9+15+94=118   S2: 4+10+94=108   S1: 1+5+94=100   S6-S5-S4+S3+S2-S1= 16-12+8= 
<gadget id="calculator">16-12+8</gadget>
<output>12</output>
12   12nswer 12
<result>A</result>
Sn = n^2 + 5n + 94 and K = S6 – S5 - S4 + S3 + S2 – S1. What is the value of K?