$400-127,7$
$\int_7^{\infty}\left(\frac{1}{x^2-16}\right)dx$
$3\cdot25^x+6\cdot5^x=60$
$\frac{x^2+\frac{1}{2}-2}{x+2}$
$\int\frac{4x-11}{x^{3}-9x^{2}}dx$
$3x^4+23x^3+56x^2+52x+16$
$b^2+7b+12$
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