$\left(2a-b\right)\left(4a^2+2ab+b^2\right)-\left(2a+b\right)^3$
$11x^4-9x^2+3x+11-2x^4-6x^3-2x+9$
$5x^3\left(6x-3\right)$
$y''+\left(1+2x\right)y'+xy$
$\int\sinh\left(6-3x\right)dx$
$\left(3m-4\right)\left(9m^2+12m+16\right)$
$2.52-0.29$
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