4537.sagews

def f(x):
    return x^3-x^2-2*x+3
def g(x):
    return exp(x)*f(-x)
g(-4); n(g(-4))

43*e^(-4) 0.787572472215570

p1 = plot (f, (-2,3), rgbcolor=(1,0,0))
p2 = plot (g, (-8,1.65))
t1 = text ("y=f(x)", (3,4), rgbcolor=(1,0,0))
t2 = text ("y=g(x)", (1,9))
show (p1+p2+t1+t2)

x, y = var('x,y')
plot3d(2*x^3 + x*y^2 + 5*x^2 + y^2, (x,-3,3), (y,-3,3))