$\int_1^2\left(\frac{1}{\sqrt{25-4x^2}}\right)dx$
$\left(2xg+z\right)^2$
$\tan^2\left(a\right)+\sin^2\left(a\right)=\left(\sec\left(a\right)+\cos\left(a\right)\right)\left(\sec\left(a\right)-\cos\left(a\right)\right)$
$4+2-b$
$x\:+\:5\:<\:3$
$9x^4-30x^3y-25xy$
$\frac{dy}{dx}=\frac{1}{1-x^2}$
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