a) 213- (-143)+ (-213)- 43
= 213 +143 -213 -43
= (213 -213) +143 -43
= 100
b) (15.2³+ 2³) :2^5 - 5.7
= [2³.(15 +1)] ÷ 2^5 -5.7
= (2³.16) ÷ 2^5 - 5.7
= 16÷2² -35
= 16÷4 -35
= 4 -35
= -31
c) 568 - {5[ 149 -( 4-1)²] +10} :10
= 568 -[5.(149 -3²) +10] ÷ 10
= 568 -(5.140 +10) ÷ 10
= 568 -(700 +10) ÷ 10
= 568 -800 ÷10
= 568 -80
= 488