44.sagews

sage: x = var('x')
sage: solve(x^2 + 4*x + 2, x)

[x == -sqrt(2) - 2, x == sqrt(2) - 2]

cos(u)

sage: u = var('u')
sage: diff(sin(u), u)

cos(u)

sage: f = 1/((1+x^2)*(x+1))
sage: f.partial_fraction(x)
sage: print f.partial_fraction(x)

1 x - 1 --------- - ---------- 2 (x + 1) 2 2 (x + 1)

x = var('x')
solve(x^2 + 4*x + 2, x)

[x == -sqrt(2) - 2, x == sqrt(2) - 2]

text $\int a-c dx$

maxima:plot2d([x^2], [x,-2,2],
 [plot_format, gnuplot])$