1) y = 3e^x - sin(2x),
y' = 3*e^x - 2cos(2x)
2) y = (sqrt(x)*e^(2 - x),
y' = e^(2 - x)/(2√x) - (√x)*e^(2 - x) = (e^(2 - x) * √x / 2x) - √x * e^(2 - x) = (√x)*e^(2 - x) * (1/2x - 1) = ((√x) * e^(2 - x) * (1 - 2x)) / (2x)
3) y = 2^(5x),
y' = 5*(2^(5x))*ln5