$\frac{20a^2b^2}{-10a^5b}$
$2\sin^2\left(x\right)-\sin^2\left(2x\right)=0$
$x^2-4x-2y+5=0$
$3\sin^3\left(x\right)\csc\left(y\right)+\cos^2\left(x\right)+2\cos\left(-x\right)\cos\left(x\right)$
$2x+7\ge9$
$\int\frac{x^2+2x-1}{x^3+3x^2+2x}dx$
$-93+191+\left(-179\right)$
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