$\int2x\left(7x^2+1\right)^{\frac{1}{2}}dx$
$2x^2+8x=10$
$\frac{x^2+\frac{1}{x}}{x^2+\frac{1}{x}}$
$-6-3x$
$12-6+8-\left(-8\right)$
$\left(1-\cos^2\right)\left(\csc^2-1\right)$
$4+4x^2-x^2$
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