$\left(a+b\right)\left(a^4+a^2b^2-b^4\right)$
$42\cdot10$
$\left(1-i\right)\left(\sqrt{3\:}-2i\right)$
$b-5>-4$
$\int_0^{\infty\:}\frac{x^2\cdot\:\:cos\left(\frac{x}{5}\right)}{\left(x^2+25\right)^2}dx$
$a^2b+b^3+b^2a+a^2b+b^2a+a^3+a^2b+b^2a$
$-3\:x\:5\:+\:7$
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