如图,已知正方体\(ABCD-A_{1}B_{1}C_{1}D_{1}\)中,点\(E\)是上底面\(A_{1}C_{1}\)的中心,化简下列向量表达式,并在图中标出化简结果的向量.
\((1) \overrightarrow{AB}+ \overrightarrow{BC}- \overrightarrow{C_{1}C}\);
\((2) \dfrac {1}{2} \overrightarrow{AB}- \dfrac {1}{2} \overrightarrow{DA}- \overrightarrow{A_{1}A}\).