Problem with the function image about coefficients

[ChangSakura]

Description

In the function image, the rendering functions with coefficients has problems.

Reproduction

Input functions with some coefficients.

Expected behavior

It is expected that in the function image, the rendering of functions with coefficients is correct.

Screenshots

[Example 1]

After enclosing the coefficients in parentheses, the image renders fine:

[Example 2]

After enclosing the coefficients in parentheses, the image renders fine:

[Example 3]

After enclosing the coefficients in parentheses, the image renders fine:

[Example 4]

After removing the brackets where the coefficients are, the image renders fine:

[Example 5]

After removing the brackets where the coefficients are, the image renders fine:

[GregTaoo]

try y=sin(eπx), y=sin(xeπ), y=sin(x(eπ))
y=sin(eπx) or y=sin(x(eπ)) wouldn't be displayed

[GregTaoo]

Also try y=eπx and y=x(eπ)

[NriotHrreion]