Practice problem
7a3b2c+abc=?7a^3b^2c+abc={?}7a3b2c+abc=?
7a3bc+ab2c7a^3bc+ab^2c7a3bc+ab2c
7abc+a3b2c7abc+a^3b^2c7abc+a3b2c
7cb2a3+cba7cb^2a^3+cba7cb2a3+cba
a37b2c+abca^{37}b^2c+abca37b2c+abc
Type a concept, like “slope” or “photosynthesis”.