3*3

Integrate[x^2,x]

Integrate[ Cos[ 2 omega t ], {t, 0, pi/omega}]

((Cos[pi] Sin[pi])/omega)

Integrate[ Cos[ 2 omega t ], {t, 0, 2 Pi/omega}]

Plot[Sin[x^2], {x, -1, 5}]

v = { { a, b }  }
w = { { c, d} }
Transpose[w] . v

Evaluate[Integrate[Sin[x]/x, {x, 0, Infty}]]

SinIntegral[999999999999]