$\int\sin2x\sin xdx$
$100v^2-220+121$
$\int\left(\frac{x^2+3}{x^3-5x^2+6x}\right)dx$
$16x^2-32x=65$
$m^4\cdot m$
$2x+3y-z=3$
$\lim_{x\to0}\frac{\left(\tan\left(2x\right)cos\left(2x\right)-sin\left(5x\right)\right)}{sin\left(3x\right)}$
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