$\int_0^1\left(\frac{8}{\pi}\right)\sqrt{1-x^2}dx$
$9x^2-30x^2y+25x^2y^2$
$\int\frac{3x^2+x+4}{x^3+1}dx$
$\left(2a^3+7a^2\right)^2$
$2x^2-20$
$-sin\left(3t\right)sin\left(t\right)-cos\left(3t\right)cos\left(t\right)$
$\left(x^5y^1\right)^4$
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