$70$ points

$[10]$ Plot and Compute the real intersection$($s$)$ if any, between the two expressions.

a$)y=x+7$ and $y=4-3x$

b$)y=x^2-x+2$ and $y=6-12x$

c$)y=x^2$ and $y=4-3cos(x)$

d$)y=ln(x)+e^x$ and $y=-4+x^3$

e$)y=x-x^3+2$ and $y=1-x^4+x^2($use matlab code for this and generate the code with output$)$