-6 + 1/4x + 3(1/4x + 6)

"I, Too" by Langston Hughes- references a Walt Whitman work, uses free verse.

"From the Dark Tower" by Countee Cullen- paradox of social injustice, uses set meter and rhyme scheme, symbol of wasted efforts.

Explanation:

"I, Too" by Langston Hughes is a reference or rather a response to Walt Whitman's poem "I Hear America Singing". Whitman's poem talks about the diverse professions "singing" together which makes up the great nation of America. But while including people from all professions, be it the mechanics, carpenter, or woodcutter, signifying the importance of any job that one is doing, he did not include that of the slaves which Hughes uses in his poem to respond to Whitman's poem. In his poem, Hughes centralizes the young black slave, suggestive of his American nationality.

This poem also has no specific rhyme scheme or meter, thus making it a free-verse poem.

Countee Cullen's poem "From the Dark Tower" shows a paradox of injustice when the poem talks of how others reap the fruits of someone else's hard work. This poem also shows a symbol of wasted effort for those whose works are taken by others. And the poem uses a set meter and rhyme scheme, for the poem is written in the ABBA rhyme scheme twice in the first stanza.