<p>what's up guys?

How do you guys solve these problems?

I know these are easy for you guys but not for me!

Please give me a hand.</p>

<ol>

<li><p>Find dy/dx

y=x^3sin^4x</p></li>

<li><p>Find all values of the constants m and b for which the fuction is continuous at x=pi. And Differentiable at x=pi.</p>

<p>sinx, x<pi

mx+b, x is greater than/equal to pi

(y= is in front of two equations)

Many thanx in advance.</p></li>

</ol>