Verify each of the following :
(i) (57×1213)×718=57×(1213×718) (ii) −1324×(−125×3536)=(−1324×−125)×3536 (iii) (−95×−103)×21−4=−95×(−103×21−4)
Evaluate each of the following: (i)23−35(ii)−47−2−3(iii)47−−5−7(iv)−2−59(v)−3−8−−27(vi)−413−−526(vii)−514−−27(viii)1315−1225(ix)−613−−713(x)724−1936(xi)563−−821