=-25 . 35 - 25 . 147 + 35 . 25 + 35 . 147
=-25 . 35 + 35 . 25 + 35 . 147 - 25 . 147
= 0 + 147 (35-25)
=0 + 147 . 10
= 0 + 1470= 1470
-25.(35 + 147) + 35.(25 + 147)
= -25.182 + 35.172
= -25.(10 + 172) + 37.172
= -25.10 + (-25).172 + 37.172
= -250 + 172.( -25 + 37)
=-250 + 172. 12
=-250 + 2064
=1814