$40+50+30$
$\left(a^2b-3d^2-4ab\right)x\left(5ab-9a^2b+8b^2\right)$
$\int\frac{2x^4+3x^3-x^2}{x^3}dx$
$\left(3\right)\left(4\right)\left(9\right)\left(6\right)$
$+x^2-9x+1+3x^2-4x+6-8x^2+3x-4$
$1-cos^2x=0$
$14m^2-12m-10$
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