Cos^2(y)dy=(1/1+x^2)dxy/2+sin(2y)/4=aractan(x)+C2y+sin(2y)=arctan(x)+C
2. 14x+15x, or 29x (simplified form)
3. 27x+5x, or 32x (simplified form)
4. 64x+6x, or 70x (simplified form)
Hope this helps.
I dont really know if this is right myself, but i'm just using the skills my teacher thought me.
The transformation for this specific diagram is (-y,x)
Keep lookin or read again so yu can get it again