$\frac{dx}{dy}=x^2-2x+2$
$f\left(x\right)=-10x^4+4x$
$60\::\:\left(-5\right)$
$\cos\left(\frac{\pi}{2}-x\right)\csc\left(x\right)$
$3,14\cdot625$
$sec\left(x\right)+\frac{sin\left(x\right)}{cos\left(x\right)}=\frac{cos\left(x\right)}{1-sin\left(x\right)}$
$-7\cdot\left(-5+7\right)+\left(-8+7\right)$
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