August 2018 2 28 Report
A) (a+b) + (2a-b)
b) 2x+(3y-2z)+(3z-2x)
e) (m+n) - (2m+3n)
f) (2xy+4y²) - (3yx-2y²)
Oczywiście obliczyć to proszę.
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