$\int_{\infty}^0\left(2-x\right)^{\frac{-3}{2}}dx$
$2xy^3-8x^2y^3+5xy^3+3x^2y^3$
$\:\frac{2x}{\left(x+1\right)^2}$
$\frac{148}{-2}$
$\int\left(x^2+3x+4\right)\left(2x+3\right)dx$
$\int_{\frac{\pi}{4}}^{\frac{\pi}{2}}xsin\left(5x\right)dx$
$-151\ge-45-a$
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