Symbol
Problem
Simplify the following expressions: $a\right)$ $\right)$ $5\dfrac {1} {7}+\left(3-\left(4\dfrac {1} {2}-\left(\dfrac {1} {4}$ of $1\dfrac {1} {3}+2\dfrac {1} {5}+1\right)\right)\right)$ $\right)$ $13\dfrac {1} {5}-\left(\dfrac {1} {5}$ $\left(4\dfrac {1} {25}+3$ 3 of $5\dfrac {1} {4}$ $-6\dfrac {1} {4}\right)\right)$