$\frac{3}{10}x^3-\frac{1}{4}x^3$
$a2\:-30+225$
$x^3+2x^2-15x$
$\tan\left(x\right)+\tan\left(x\right)\csc\left(x\right)=\tan\left(x\right)+\sec\left(x\right)$
$\int e^{-2x+3}dx$
$2a^4-\:\:4a^2b^2+2b^4$
$\frac{21a^8b^{10}c^8}{63a^4bc^2}$
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