$p^4-p^2-p+1$
$\int e^{-3x}cos\left(4x\right)dx$
$-\frac{54}{6}$
$-4x^2+2x-4$
$\int\left(x^3+1\right)\cos\left(x^4+4x\right)dx$
$\lim_{x\to0}\frac{x-senx}{x^2}$
$\int5\cdot\cos\left(\sqrt{x}\right)dx$
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