$\frac{x-3}{5-x}+5\frac{2x+3}{x-2}\text{. }x=-1$
$x^3-3x+\frac{7}{x^2}+3$
$\int te^{-7t^2}dt$
$\int_0^{2\pi}\left(-4cosxsenx\right)dx$
$-4x^2+32x+36$
$\int\frac{3x}{\sqrt{2x^{2}+1}}dx$
$7bc+15bd+4bc-12bd$
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