$\int_1^{\infty}\left(\frac{1}{x^2+2x}\right)dx$
$\int sin\theta\:\left(cos\theta\:+42\right)^{13}d\theta\:$
$3x^2+20x+25$
$\int\frac{1}{\left(1+e^u\right)}du$
$50=-6-4n$
$7^8\cdot2^8$
$\int_0^4\left(x^2e^{\frac{x}{2}}\right)dx$
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