$2a^2+5a+28$
$4n^2-8n-12$
$-3^2+\left(-2\right)^4-4^3+\left(-2\right)^4$
$\left(3x+1\right)dy=2ydx$
$\int_{-2}^1\left(x^2+2x\right)dx$
$\int cos^4x\:sin\:x\:dx$
$-2^2+2\left(-2+3\right)+3^2$
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