寄こす[yokosu] to send
引寄せる[hikiyoseru] to draw or pull something towards oneself (e.g. chair)
押寄せる[oshiyoseru] to advance on
滑り寄る[suberiyoru] to slide up to
寄せ[yose] last moves (in go, shogi, or chess)

寄せる[yoseru] to come near
寄せ算[yosezan] addition
寄集め[yoseatsume] mish-mash
寄せ集める[yoseatsumeru] to put together
寄付ける[yosetsukeru] to let (someone) come near

アナログ計算機[anarogukeisanki] analog computer
シフト演算機構[shifutoenzankikou] shift arithmetic unit
暗算[anzan] mental arithmetic
違算[isan] miscalculation
一般命令演算機構[ippanmeireienzankikou] general instruction unit (computer)

運算[unzan] mathematical operation
演算[enzan] (mathematical) operation
演算機[enzanki] processor (as in computer chip)
演算子[enzanshi] operator
演算手順[enzantejun] algorithm