schematic create ina inputnode 30 400
schematic create diff difference 100 400
schematic create t1 transformation 200 400
schematic create outa outputnode 400 400

schematic connect ina output diff inputa
schematic connect t1 output diff inputb
schematic connect diff output t1 input
schematic connect t1 output outa input

schematic position ina output right
schematic position t1 input left
schematic position t1 output right
schematic position outa input left
schematic position diff inputa left
schematic position diff inputb down
schematic position diff output right

schematic program t1 1.75z^2+3z+2/z^2+4
