Question 6
Simplify
$$\frac3{1!+2!+3!}+\frac4{2!+3!+4!}+\cdots+\frac{2019}{2017!+2018!+2019!}.$$
Answer entry: use / for division, ! immediately after an integer for factorial, and - for subtraction, without spaces. Only explicitly listed exact strings are recognized; symbolic simplification is not supported. An equivalent unrecognized expression requires manual checking and must not be treated as wrong or scored zero solely for nonrecognition.
$$\frac3{1!+2!+3!}+\frac4{2!+3!+4!}+\cdots+\frac{2019}{2017!+2018!+2019!}.$$
Answer entry: use / for division, ! immediately after an integer for factorial, and - for subtraction, without spaces. Only explicitly listed exact strings are recognized; symbolic simplification is not supported. An equivalent unrecognized expression requires manual checking and must not be treated as wrong or scored zero solely for nonrecognition.