$-2x^2+30x=112$
$\sqrt[2]{0.0004}$
$\frac{1}{1-\text{senb}}+\frac{1}{1+\text{sen}b}=2\sec^2b$
$\int_2^{-4}\left(4+x\right)-\left(2-x\right)dx$
$a-3a+2ac-3bc$
$\int_x^{x^4}\left(e^{t^2}\right)dt$
$\left(x+y-3\right)-\left(2x-y-5\right)$
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