$15x^2-x^2$
$\frac{-14a^3b^2-21ab^3+35a^4b^3}{7\:a\:b}$
$\int\frac{72}{\left(x+1\right)}dx$
$\int_0^2\left(sec\left(x\right)\right)dx$
$5gm^2\left(2g^2m-gm^3+4g^2m^2\right)$
$8^2+6^2$
$1.0075^9-1$
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