\color{grey}{
y(x) =
\begin{cases}
  \frac{3}{4} * x^{3} * \frac{7}{8} x & \text{dla x ∈ <-10, 0>} \\
  \frac{1}{sin(x) + 3} & \text{dla x ∈ (0, 4>} \\
  -2x/3  & \text{dla pozostalych}
\end{cases}}
