Find the coefficient of y^4 in the expansion of (2y-5+3y^2)^6.
The coefficient of y^4 is 126.
The coefficient of y^4 is 375.
(2y−5+3y2)6=15625−37500y−18750y2+92500y3+375y4−99960y5+6364y6+59976y7+135y8−19980y9−2430y10+2916y11+729y12
!
I recamend Symbol Lab. Type it in then find what you're looking 4
https://www.symbolab.com
+15069 
!
+35 
