a)^-putere
=[(2^5)^6+(5²)^4-13²]:[(2³)^10+(5^4)²-13²=
=[2^30+5^8-13²] /[2^30+5^8-13²]=1
b)=3^105:(5^(221-220)-2):(3³)^20=
=3^105:(5-2):3^60
=3^105·3:3^60=3^(105+1-60)=3^44
c)=(2²)³:2²-1·[5^(10-9)-6²·(7^(15-13)-7²]=
=2^6:2²-1·[5-6²·(7²-7²)]=
=2^(6-2)-1·(5-6²·0)=
=2^4-5=16-5=11
d)=1+37:{2·81-5·[2^(7-4)-3^(2-1)]²=
=1+37:{162-5·[2³-3]²}=
=1+37:[162-5(8-3)²]=
=1+37:(162-25)=
=1+37:137
probabil ca ai gresit cand ai scris ex.in loc de 37 trebuia 137
