$\sin\left(7y\right)\cos\left(3y\right)-\cos\left(7y\right)\sin\left(3y\right)$
$-3-2\left(1-6x\right)$
$\left(a-d\right)\left(a-b\right)$
$\left(\left(1\right)-5b^3\right)\left(2a+5b^3\right)$
$\int_0^{\sqrt{x}}xcos\left(x^2\right)dx$
$\int\frac{4x^2}{\left(16+x^2\right)}dx$
$3x+4-2x+c$
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