$\int\left(x^2\sqrt{\left(2x^3+9\right)}\right)dx$
$-7^2-\sqrt{121}$
$\sin\left(x-y\right)-\sin\left(x+y\right)=-2\cos\left(x\right)\sin\left(y\right)$
$\int\frac{8}{4+\left(x+3\right)^2}dx$
$x^2+12x+36=25$
$\frac{\left(9x^2\right)}{4}-25$
$11a^3-4a^2+11a$
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