Zredukuj wyrazy podobne.
1) 3a^{2}bcb^{2}3 = ?
2) ab^{2} + a + ab - 3ab^{2} - 2a = ?
3) 2a^{2} + 3a - 7b - 6a^{2} - 3a = ?
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3a^{2}bcb^{2}3 = ?
ab^{2} + a + ab - 3ab^{2} - 2a = -a + ab - 2ab^{2}
2a^{2} + 3a - 7b - 6a^{2} - 3a = - 4a^{2} -7b