k=input('Zadej krok:');
x=0:k:10;
figure(1)
y=(x.^2)+(3*x)-1;
z=(2*x)+4;
plot(x,y,x,z)
figure(2)
subplot(1,2,1)
y=sin(x);
plot(x,y)
subplot(1,2,2)
y=cos(x);
plot(x,y)
figure(3)
y=(x.^3);
z=tan(x);
plot(x,y,x,z)
figure(4)
subplot(1,4,1)
y=log10(x);
plot(x,y)
subplot(1,4,2)
y=log(x);
plot(x,y)
subplot(1,4,3)
y=1*x.^-1;
plot(x,y)
subplot(1,4,4)
y=1*x.^-2;
plot(x,y)