a) 7²+7*2=
b) 8²+3*2³=
c) (4+1)²+5*8
d)*(5²+2³=

a) 7²+7·2=7·7+14=49+14=63
b) 8²+3·2³=8·8+3·2·2·2=64+3·8=64+24=88
c) (4+1)²+5·8=5²+40=5·5+40=25+40=65
d) 3·(5²+2³)=3·(5·5+2·2·2)=3·(25+8)=3·33=99