35×28=980
35×56= ×14=980
70×28= 35×=9800
35×140= ×28=9800
27+19=19+ 183+23=+183
46×=23× 76×28=×76
187+129+118=187++
230+(170+82)=(+)+82
37+16+63+84=(37+)+(+)