Question 81
Are there integers $a \lt b \lt c \lt d$ such that
$$
\frac{a}{a} + \frac{a}{b} + \frac{a}{c} + \frac{a}{d} = \frac{b}{a} + \frac{b}{b} + \frac{b}{c} + \frac{b}{d} ?
$$
$$
\frac{a}{a} + \frac{a}{b} + \frac{a}{c} + \frac{a}{d} = \frac{b}{a} + \frac{b}{b} + \frac{b}{c} + \frac{b}{d} ?
$$