$9-7,94$
$\frac{2i-1}{i^2+i}$
$\int e^u\cdot u$
$\lim_{x\to+\infty}\left(\frac{\sqrt{x^2+x}-x}{1}\right)$
$\left(1-\sin\left(x\right)^2\right)\cdot\tan\left(x\right)=\cos\left(x\right)\sin\left(x\right)$
$\left(-x^4\right)^2$
$7z+3=3+7z$
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