$\frac{1-\cos\left(x\right)}{\left(\sin\left(x\right)\right)^2}=\frac{1}{\sin\left(x\right)}$
$nvauyv$
$\left(-26\right)\cdot\left(-72\right)$
$\int\frac{3x^2-5x+2}{x^3-2x^2+3x-6}dx$
$\int2\cos\left(x^2\right)dx$
$x^{30}-2x$
$100-w^2$
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