In[20]:= Prepared by Usama Javed

Solve[{a * h^3 + b * h^2 + c * h p - s, 8 * a * h^3 + 4 * b * h^2 + 2 * c * h q - s ,27 * a * h^3 + 9 * b * h^2 + 3 * c * h r - s}, {a, b, c}]

Out[21]= a - -3 p + 3 q - r + s6 h3

, b - 5 p - 4 q + r - 2 s2 h2

, c - -18 p + 9 q - 2 r + 11 s6 h

In[18]:= Integrate

- -3 p + 3 q - r + s6 h3

* x^3 + - 5 p - 4 q + r - 2 s2 h2

* x^2 + - -18 p + 9 q - 2 r + 11 s6 h * x + s,{x, 0, 3 * h}Out[18]= 9 h p

8+ 9 h q

8+ 3 h r

8+ 3 h s

8