$x{y}^{\text{'}}-y=x^2$

$2.y^{\text{'}}+2xy=x^2$

Use $?$erfi to see what erfi $(x)$ means. How will you interpret this?

$3.(4+2y)y^{\text{'}}=4-e^x$

How do you type $e^x??$ exp

$4.y^{\text{'}}=sin(y)$

Use $?$arctan to see what $arctan(x,y)$ means.

$5.y^{\text{'}}-y=x{y}^3,y(0)=-1$

Try this one both with the initial condition and without it$.$

$6.x{y}^{\text{'}\text{'}}+y^{\text{'}}=4x$

Note: the syntax for indicating a second derivative is diff$(y(x),x,x).$

$7.$ BONUS: $y^{\text{'}}=\frac{2x+3y+1}{3x-2y-5}$

This one is tricky, can you solve it by hand faster? How do we interpret what is going on here?