$36c^2-a^2$
$\int_{-\infty}^{-9}\left(\frac{80}{x^2-64}\right)dx$
$\int2sin^2xdx$
$2y^2-y-21=0$
$\int15x\cos\left(2.5x^2+1\right)dx$
$\int\left(tan^34xsec^5\left(4x\right)\right)dx$
$2y=x^2+z^2+4$
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