$\frac{1}{2}\left(4x^4-9x^2+8x-12\right)$

$34-\left(-81\right)$

$\int\left(a+2\right)\sin\left(a^2+4a-6\right)da$

$\frac{\left(\sin\left(x\right)+\cos\left(x\right)-1\right)}{\cos\left(x\right)}$

$2\left(x.cos\left(y\right)\right)\left(-x.\:sen\left(y\right)\right)-2\left(x.sen\left(y^2\right)\right)\left(2x.y.cos\left(yt^2\right)\right)$

$\int3x\left(x+1\right)dx$

$\log_{14}\left(13a-3\right)=\log_{14}\left(a^2+33\right)$