$\frac{y^2-11y+28}{y-4}$
$27r^2-12$
$\int_0^{\pi}\left(\sin\left(x\right)tan\left(x\right)\right)dx$
$\left(csc\left(x\right)-sec\left(x\right)\right).sec\left(x\right)$
$4x-5+2x=7$
$x^2+5x+2+3$
$\frac{dy}{dx}=\frac{6x}{3y^2}$
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