$-2\cos\left(x\right)\cdot x\sin\left(x\right)+2\sin\left(x\right)\cdot x\cos\left(x\right)$
$mgc\cdot nm4^2\cdot mgf5-5um^2$
$300-24$
$\int\left(x+e\cdot\right)^2$
$\left(-8\right)-\left(-3\right)$
$\frac{-1^3-1}{-1^2}$
$g^4-2g^3+g^2$
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