$\left(\frac{2x^{-3}y}{3a^2b^4}\right)^3\left(\frac{x^2y}{a^2b^4}\right)$
$3x-1\le-0$
$\csc\left(x\right)\sin\left(2x\right)-\sec\left(x\right)\cos\left(2x\right)=\sec\left(x\right)$
$25,42+14,33+25,6+14,3+18,2$
$3+20+-1$
$8\cdot10+3+9$
$-\:25x^2+10x+63$
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