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The First Steps in Algebra
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Table of Contents
PARENTHESES.
2
c
−
(
a
−
b
)
.
2
c
−
5
(
a
−
b
)
.
2
b
−
3
(
a
−
c
)
.
2
c
−
b
(
a
−
b
)
.
19
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