¿Cuáles expresiones son equivalentes a 7^{-2}\cdot 7^67 −2 ⋅7 6 7, start superscript, minus, 2, end superscript, dot, 7, start superscript, 6, end superscript?

No se

The answer is avezes la tarea de lupe se caí en agua, pero siempre se la entrega al maestro, sin hacer trampa. hope this .

"tu subes" is second person singular

The correct answer is
1. black death

a deadly plague that swept through europe between 1347 and 1351, it killed one third of european population, but the left food supply give chances to survivors for advancement.

and

2. smallpox

an eradicated virus that used to be contagious, disfiguring, and often deadly.