$2\sin\left(3x\right)=-1$
$-21-1$
$2\cdot\left(x-4\right)-0.5\cdot\left(4-4x\right)\ge-6$
$\int\frac{-2\ln\left(x\right)}{x^2}dx$
$12a^2b^3c-24ab^2c^2+48ab^3c^3-36abc^2$
$\frac{9a^4-2-6a-a^2}{3a-1}$
$csc^2x-4=0$
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