When multiplying two powers that have the same base ($a$), you can add the exponents
$a^2pnma$
2
When multiplying exponents with same base you can add the exponents: $a^2pnma$
$a^{3}pnm$
Final answer to the problem
$a^{3}pnm$
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The simplification of algebraic expressions consists in rewriting a long and complex expression in an equivalent, but much simpler expression. This simplification can be accomplished through the combined use of arithmetic and algebra rules.