$-5\left(3x-w-2\right)$
$x+2x^2-3x$
$\sqrt{20}-2\sqrt{5}$
$\sec\left(x\right)\cdot\left(\csc\left(x\right)-\sin\left(x\right)\right)$
$5x^2-15x+10$
$1,5\cdot23,99$
$6x-2-x^2<3x$
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