7x2(5m+y)

To simplify the expression \( 7x^2(5m + y) \), you can distribute \( 7x^2 \) to both terms inside the parentheses.

The simplification proceeds as follows:

\[ 7x^2(5m) + 7x^2(y) = 35mx^2 + 7yx^2 \]

So, the final simplified expression is:

\[ 35mx^2 + 7yx^2 \]