`sin2x-4e^(3x)`

Explanation

`int(sin2x-4e^(3x))dx=intsin 2x dx-4 inte^(3x)dx`
`=-(cos2x)/(2)-(4.e^(3x))/(3)+c`
`=-(1)/(2)cos 2x-(4)/(3)e^(3x)+c`