restart:
f:=sin(x);
g:=cos(2*x);
f;
h:=tan(x);
j:=1/sin(x)+1:
f*g-j*h;
int(f*g+j*h^2,x);
diff(f/g+j/h,x);
simplify(diff(f/g+j/h,x));
sqrt(h+j);
exp(2);2*Pi;
evalf(exp(2));
evalf(2*Pi);
2.3.4;
2/3/4;
?.
?int
int(1/sqrt(2*t^4-3*t^2-2), t = 2 .. 3);
1/sqrt(2*t^4-3*t^2-2);
plot(1/sqrt(2*t^4-3*t^2-2),t=-5..5,view=[-5..5,0..10]);
plot(2*t^4-3*t^2-2,t=-5..5, view=[-5..5,-10..10]);
plot([1/sqrt(2*t^4-3*t^2-2),2*t^4-3*t^2-2],t=-5..5,view=[-5..5,-5..10]);
solve({3*x+5*y=6,2*x-4*y=1},{x,y});
with(plots);
implicitplot([3*x+5*y=6,2*x-4*y=1],x=-2..2,y=-2..2,color=[red,green], thickness=3);
solve({4*x+6*y+5*z=1,2*x-3*y-z=0,-5*x+y+2*z=-7},{x,y,z});