3(a+2b-3c)+7(2a-4b+5c)-5(-3a-4b-5c)
doprowadź do najprostszej postaci
3a+6b-9c+14a-28b+35c-15a+20b+25c=
2a-2b+51c
3a+6b+9c+14a+28b+35c+15a+20b+25c=32a+54b+69c
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3a+6b-9c+14a-28b+35c-15a+20b+25c=
2a-2b+51c
3a+6b+9c+14a+28b+35c+15a+20b+25c=32a+54b+69c