plot([3^x, exp(x), 4^x], x=-3 .. 2, color=black);plot([3^x, x, log[3](x)], x=-2 .. 2, y=-8..8,color=black, scaling=constrained);plot([sqrt(1-x^2), -sqrt(1-x^2)], x=-2..2, color=black, scaling=constrained);plot(cos(x), x=-4*Pi..4*Pi, y=-2..2,color=black);plot(sin(x), x=-4*Pi..4*Pi, y=-2..2,color=black);plot(tan(x), x=-2*Pi..2*Pi, y=-2..2, color=black);