$\int\frac{x^2-1}{\left(16x^2+25\right)\left(x^2+8x+25\right)}dx$
$16c^2-16c+4$
$\int3a^xdx$
$5 x ^ { 3 } + 7 x ^ { 4 } + 6 x ^ { 3 } - 5 x + 4$
$\int\left(49\right)x^6e^{7x^7+\left(87\right)}dx$
$49x^4y^2-64w^{10}z^{14}$
$11x\:+\:7y\:-\:3-\:9x\:-21y\:-3$
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