The phrase "a simple expression for" is correct and usable in written English.
It can be used when introducing a straightforward way to convey a concept or idea.
Example: "In mathematics, a simple expression for the area of a circle is A = πr²."
Alternatives: "a straightforward representation of" or "an easy formulation for".
Their model also yields a simple expression for the welfare gains from trade (p. 15): Real income = A* 1-import shA* 1-importeta) where A ishareional productivity and theta is a parameter of their assumed random process (don't ask); they suggest that theta=4 provides the best match to available data.
A simple expression for calculating its magnitude is derived.
A simple expression for the required inertance is derived.
The result gives a simple expression for correlating experimental data.
In this paper, a simple expression for predicting the SHStS transformation parameter α is proposed.
A simple expression for the displacement is found to give a good description for moderately large times.
In order to obtain a simpler expression for I adm, we will assume high SNR in the data transmission phase.
Single infinite series representation: The second result provides a simpler expression for (18) involving only a single infinite sum [23], which was proposed by Moschopoulos [24].
2) Single infinite series representation: The second result provides a simpler expression for (18) involving only a single infinite sum [23], which was proposed by Moschopoulos [24].
After that, a simpler expression for the eigenvalue distribution was presented by Sun et al. [41], where only conventional ( -dimensional) determinants were involved.
The main problem in order to obtain a simpler expression for the bit error probability is to simplify the PDFs of U1 and U2 given, respectively, in (14) and (15).
