$4\cos\left(x\right)=-1$
$\left(2+b\right)\left(8+b\right)$
$\left(x^3+3x-2\right)\left(a+b\right)+\left(x^2+3x-2\right)\left(a-b\right)-\left(x^2+3x-2\right)$
$\left(2a+3b\right)^3=8a^3+27b^3$
$\int\left(9w^2+12w+4\right)^{\frac{4}{3}}dw$
$f\left(x\right)=\ln\left(x+3x^2\right)^4$
$2r^2-15r-27$
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