cs
math

the cards
we donot write the math problem before we donot decide on the symbols and
what we do inthe solution of the problem
we wrote them by red pen
in this

and on the another side of the card - the solution or
the material with control

isaak yakovlevitch soloviev liteinyi

we can to write thi in the computer
B
the pointer s for one tree the matherial to study
and the one for the solution
or the connection with another matherial
grisha perlman or kamenskaya do this for me
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the same see Bin the data bes on the criminal files