\(\overrightarrow{MQ}-\overrightarrow{NQ}=\overrightarrow{MQ}+\overrightarrow{QN}=\overrightarrow{MN}\)
\(\overrightarrow{MN}-\overrightarrow{MP}+\overrightarrow{NP}=\overrightarrow{MP}-\overrightarrow{MP}=\overrightarrow{0}\)
\(\overrightarrow{MN}-\overrightarrow{PQ}+\overrightarrow{NQ}=\overrightarrow{MN}+\overrightarrow{QP}+\overrightarrow{NQ}=\overrightarrow{MQ}+\overrightarrow{QP}=\overrightarrow{MP}\)
\(\overrightarrow{MQ}-\overrightarrow{PQ}+\overrightarrow{PN}=\overrightarrow{MQ}+\overrightarrow{QP}+\overrightarrow{PN}=\overrightarrow{MP}+\overrightarrow{PN}=\overrightarrow{MN}\)


