WL is case sensitive, Sin and Cos, not sin and cos, and function arguments are enclosed in [ ], not ( ). Those are the changes Marvin made. However, the expression does not look right
$$\frac{\int_0^{70} p^2 \left(-\frac{p^2}{1.9602}+\frac{\left(p^2-0.99^2\right)^2 \log \left(\frac{p}{0.99}-p+0.99\right)}{3.8812}+\frac{5}{6}\right) \left(\left(1 \frac{1}{1}-\frac{24 \left(-\frac{3 \sin (0.94576 p)}{0.94576}+2 \cos (0.94576 p)+\cos (1.45 p)\right)}{0.859216}\right)-1\right) \, dp}{3 \pi }$$
The 1/1 probably means the expression is not correctly parenthesized.
