$-102-91-53$
$\left(-2x+5y^3-4z^2\right)^2$
$4,05\times3,4$
$\left(2+\left(6-10\right)\right)-\left(7-14\right)$
$\lim_{x\to-0.99}\frac{\tan\left(-0.99\right)}{\sin\left(-0.99\right)}$
$\frac{\csc x}{\sin x}-\frac{\cot x}{\tan a}$
$x-9<8x-1$
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