\documentclass[preview,border=1pt]{standalone}
\usepackage{amsmath,amssymb,amsthm}


\begin{document}

\[
f(x)+g(x)+h(x) = \int_0^x \Big(
\begin{aligned}[t]
  &\big| p(y)\cos y + q(y)\sin^3 y e^y - r(y)\sin y  \\
  &\big| - s(y) - e^{y^2}\Big)\,dy.
\end{aligned}
\]
\end{document}